1 . My body hit the water with a pounding and I suddenly felt afraid that terrible things could happen. Water gushed（涌出）through my mouth and left its salty taste. My feet touched the ground as I attempted to float back up to the surface. I could see the speed boats in the distance and I started to panic.
I saw something gray from a distance coming closer and closer. As it approached me, I realized that it was not a good one-it was a SHARK! Its fin（鳍）was moving closer and I attempted to swim as fast and as far away from it as possible. My heart beat faster and faster as my body got all stiff（僵硬的）. I looked behind me and saw the huge sharp teeth pointing directly at me. As I turned away, I heard jaws shut with a mighty bite! The shark turned away and left me alone.
I looked at my feet and saw bright red blood flow into the water. I cleaned it with some water and a thought went into my mind-sharks love blood, and that was not good for me. I knew more fins were surrounding me from every direction. I was stuck in the middle of the ocean, surrounded by about ten sharks and they were all heading for me.
They all stared at me with their white sharp teeth sticking out, ready to attack. Slower and slower they got ready to bite. Just then I heard an engine heading my way and I saw a speed boat pushing some heavy waves away. As it came closer, I saw a tall man driving it. The engine roared in my ears and it began to scare the sharks away.
As they swam away, I began to make my way back to the shore. The boat sped towards me and I slowly climbed on it. With relief we headed back towards the shore.
1. What did the author do when the first shark came close to him/her?| A．He/She hit the shark. | B．He/She tried to swim away fast. |
| C．He/She dived deep into the water. | D．He/She stayed in the water quietly. |
| A．The engine drove them away. | B．A man scared them away. |
| C．They couldn't find the author. | D．They found a new target. |
| A．Frightened. | B．Nervous. | C．Anxious. | D．Relaxed. |
| A．An Exciting Trip | B．A Helpful Speed Boat |
| C．An Unforgettable Experience | D．A Brave Tall Man |
2 . You probably take many steps to protect your computer from getting a virus, but what about your cell phone? Cell phones are basically mini-computers, so, believe it or not, they too can get viruses.
“Viruses and malware（恶意软件）should not be a major concern to the average consumer who uses their device to make phone calls, take pictures, and download a few well-known apps from the major app marketplaces,” Tim Katsch Vice President of iDropped said. “If a user is downloading a lot of apps, changing and exploring settings within the device, and visiting a large number of websites from unknown sources, virus and malware protection should be kept on their mind.” If your phone gets a virus it can mess up your data, put random charges on your bill, and get private information such as your bank account number, credit card information, passwords, and your location.
The most common way that you could get a virus on your phone would be through downloading an infected app. Viruses can also get on your phone when you click on strange links or open up an email that contains a virus. Connecting to an unsecured wireless network in a public place is also a way for hackers（黑客）to get private information from your device.
If you're still convinced that your phone might get a virus, there are anti-virus apps that you can download that will constantly scan your phone to make sure it hasn't developed a virus, Apps like these will also check things before you download them to ensure that they are safe. Another tip is to always look over your cell phone bill every month to make sure there aren't charges from apps that you never downloaded.
Technology is getting smarter, but so are hackers, and it's important to always be cautious with anything you do on your phone. Many people store a lot of personal information on their phones, and while that might make life a little more convenient, it can also do a lot of damage if hacked.
1. What can we learn from Tim Katsch's words?| A．The wireless network in the public places is safe to use. |
| B．Viruses and malware will most probably attack average phones. |
| C．Downloading a lot of apps will protect your phone from being hacked. |
| D．The average consumer needn't worry much about a virus or malware. |
| A．Downloading an infected app. |
| B．Clicking on close friends' links. |
| C．Connecting to your mobile data. |
| D．Changing your private information. |
| A．Harm set, harm get. |
| B．Every coin has two sides. |
| C．Kill two birds with one stone. |
| D．Technology makes life smarter. |
| A．Anti-Virus Apps Make Your Cell Phone Safe? |
| B．Viruses and Malware Damage Your Cell Phone? |
| C．Worried About Your Cell Phone Catching a Virus? |
| D．Ready to Fight Against the Hackers to Your Cell Phone? |
3 . Almost all animals need to sleep to stay healthy. But sleeping can also be dangerous because other animals may hurt those who are sleeping. This leads to many different ways of sleeping that help them stay safe. Some of these ways may surprise you!
Almost all bats sleep upside down. They hang from a branch of a tree or the ceiling of a cave. Up high, bats are safe from most other animals. If they are in danger, they just fly away.
A dolphin sleeps with just half its brain at a time. It must stay awake to breathe and to watch for danger. Dolphin mothers and babies can go without sleep for as long as two months to stay safe.
Some ducks sleep with just half their brains, too. These ducks often sleep in a line. The ducks at both ends help to keep the group safe. They keep one eye open to watch for danger. The ducks in the middle sleep deeply with both eyes closed.
Seals breathe air, but that doesn't stop some of them from sleeping underwater. They hold their breath and dive deep to sleep for up to twenty minutes at a time. Sleeping deep underwater helps these seals stay safe from animals that hunt them near the surface.
Horses often sleep standing up. Their legs lock in place so they don't fall over. If a horse is lying down, it needs a long time to get up. A horse can run from danger more quickly if it is already standing.
A flamingo (火烈鸟) can sleep while standing on one leg. The standing leg locks so it stays straight. The other leg remains close to the flamingo's body. Its head rests on its back. A flamingo lives (and sleeps) near many other birds to stay safe.
Some seabirds can sleep while they fly. These large birds spend most of their lives over the ocean. They are in danger on the water, but they are safe in the air. They fly for many hours without flapping (拍打) their wings. Sometimes they sleep while they are flying.
Would you like to sleep how they sleep?
1. The animals that sleep with half their brains are ___________.| A．ducks and seals | B．dolphins and ducks | C．bats and dolphins | D．flamingos and seabirds |
| A．To run from danger quickly. | B．To avoid falling over. |
| C．To help them to seep deeply. | D．To shorten the time to go to sleep. |
| A．offer to help | B．come to teach | C．refuse to protect | D．want to kill |
| A．How Animals Sleep | B．Sleep To Stay Healthy |
| C．Sleep As Animals Do | D．What Sleeping Animals Are Like |
4 . The skies are raining big blocks of ice, and experts are trying to learn what's going on.
For the second time in six days, California was attacked by ice balls. The latest happened early Thursday. A large block of ice dropped into Loma Linda, California. The ice crashed through the metal roof(房顶) of a fitness center, leaving a hole up to 2% feet wide. No one was hurt.
Two tennis players were playing outside the Drayson Center on Thursday morning. Suddenly they heard a strange sound, said Crawford, an official of the Loma Linda Fire Department.
A similar event happened last Saturday in Oakland, California. Early in the morning an ice dropped into a field at Bushrod Park and made a hole up to 2 feet wide. Luckily, no one in the park was injured.
One theory (理论) is the ice was dropped from planes. But there's little direct support for that. A few experts have suggested there may be other causes of similar ice falls, perhaps even global (全球的) warming.
Stories about dropping ice go back for centuries. They didn't begin to receive serious scientific attention until a few years ago, however, when Spain was attacked by a dozen large ice balls in 2000.
Scientist Jesus Martinez—Frias in Madrid and his team have collected reports of forty cases around the world since 1999 of puzzling falling ice. He thinks the ice forms in the air by a process similar to the formation of hail (冰雹) inside storms but without a storm.
Martinez—Frias believes global warming is causing the troposphere (对流层) to rise. This means the roof of the troposphere is forced to a greater height, where it cools more than normal. Thus, the temperature difference between warm and cold air in the troposphere produces strong up—and—down winds that repeat the hail—formation process, without a storm.
1. What took place on Thursday morning?| A．A fitness center caught fire. |
| B．A big ice ball fell into Loma Linda. |
| C．There was heavy rain in Loma Linda. |
| D．Two tennis players were hit by an ice ball. |
| A．No one was injured. | B．No building was destroyed. |
| C．Both were seen by Crawford. | D．Both caused a large number of holes. |
| A．It is very common around the world. |
| B．It often happens in Spain in recent years. |
| C．It has been carefully studied since 2000. |
| D．It is most likely to be produced by planes. |
| A．Strong winds above the troposphere. | B．The formation of hail. |
| C．Global warming. | D．Big storms. |
5 . An unmanned Chinese spacecraft left the earth on a trip to the planet Mars on Thursday. The launch （发射）marks the start of one of China's most important space explorations. China's national space agency launched the spacecraft called Tianwen-1 from the Wenchang Spacecraft Launch Center on Hainan Island.
The name Tianwen means “Questions to Heaven” in Chinese. The spacecraft took off on China's largest carrier rocket, the Long March 5, and about 36 minutes later, the spacecraft, including an orbiter（轨道飞行器）and a rover（漫游车），was sent into the Earth-Mars orbit. It is expected to reach the orbit of the red planet next February. Tianwen-1 will finish three scientific goals—orbiting the red planet, landing on the Mars and sending a rover to the landing site.
Tianwen-1 carries several scientific instruments to observe the planet's atmosphere and surface. It will do a series of scientific researches on the planet's soil, geological structure, environment, atmosphere and water. Besides its daily work of exploring the surface of Mars for 90 days, it will also report back to the earth about its experiences on the red planet, which is millions of miles away. According to experts, discovering signs of life will be its first and most important scientific goal.
Tianwen-1's successful landing will make China the second nation to place a spacecraft on Mars. The United States has landed eight vehicles on Mars since 1976. China will be the first to successfully orbit, land and place a vehicle in the same mission. This is China's first independent mission to Mars. The task in 2011 failed when a Russian rocket carrying a Chinese orbiter had problems after launch, and was unable to escape the Earth orbit. Last year, China's Chang e-4 spacecraft became the first to make a landing on the far side of the moon.
1. When will Tianwen-1 enter the orbit of Mars?| A．36 minutes later. | B．Next Thursday. |
| C．In 90 days. | D．Next February. |
| A．Orbiting the Mars. | B．Landing on the Mars. |
| C．Discovering signs of life. | D．Sending a rover to the landing site. |
| A．Tianwen-1 is the second vehicle landed on the Mars. |
| B．The United States is the first to land vehicles on the Mars. |
| C．Russia helped China place Tianwen-1 on the Mars. |
| D．Chang，e-4 was the first to make a landing on the moon. |
| A．In a newspaper. | B．In a diary. |
| C．In a sci-fi novel. | D．In a guide book. |
6 . There's much to see under the sea, but you need to remember that light behaves differently in water than in air. The objects appear closer to you than they exactly are. You might find yourself reaching out to touch something and completely missing it.
Objects under water will appear larger than they would on the surface, too. Be careful not to tell any stories about the big fish that got away. That fish might not be so big after all! It's just because sometimes things can seem to be as much as about 33 percent bigger in water!
What's more, in deeper water, colors just don't seem as bright. In fact, it looks as if some colors are missing. Remember the color of an object results from the wavelengths (波长) of light that are reflected from its surface. And light is taken in as it moves down through the water.
Swimmers wear wet suits to keep warm underwater. Let's take a bright red, yellow, and blue, wet suit as an example. These colors are hard to miss on the surface of water. Watch carefully the changes in color as you descend in the water. The red part now looks almost black because the red light wavelengths, the longest among these three colors are missing. As you go down deeper, the same thing will happen to the yellow part and in the end to the blue part. Even at a place of about 6 to 9 meters underwater, you will look terrible, like a ghost! And you have to wait for your return to the surface to enjoy the bright colors again!
1. You miss the object underwater when you want to touch it because ________ .| A．it is not as close as it seems | B．you are not quick enough |
| C．it disappears very quickly | D．your eyesight is quite poor |
| A．the size | B．the color |
| C．the position | D．the weight |
| A．sink | B．stop | C．float | D．rise |
| A．The Standard of Color Underwater | B．The Direction of Light Underwater |
| C．The Behavior of Light Underwater | D．The Brightness of Color Underwater |
