1 . Sometimes we only appreciate something when we realize we may lose it. That is the story of the Everglades. A shallow slow-moving river, the Everglades once covered about 18,000 square miles of southern Florida. Until the 1900s, few people lived in the grassy wetlands. Not much was understood about the unique balance of nature that existed there. Plants, creatures, and water had formed a remarkable ecosystem.

By the early 1900s, Florida’s pleasant winters attracted more people. Visitors became new permanent residents. They built homes and roads. The conditions looked good for farming, so the newcomers planted large agricultural crops. But South Florida’s cycle of flooding was a problem. To address that, developers attempted to drain (排水) the land. They also built structures to control water levels and flow.

Those changes made it easier for more people to live year-round in South Florida. However, they also disturbed life in the Everglades, which depends on freshwater regularly refilling the land. The area’s growing human population needed freshwater. And large farms consumed large quantities of freshwater. By the mid-1900s, water levels in southern Florida began to go down. Lack of freshwater wasn’t the only problem. As more and more land was developed for people and farms, the Everglades’ historic boundaries contracted. Loss of habitat and hunting threatened the survival of native species in the Everglades.

Some people hoped that the government’s recognition might save the Everglades. They fought for it. Everglades National Park was established in 1947. It became the first park in the United States created for its biodiversity.

Now, Everglades National Park protects 1.5 million acres along the southern tip of Florida. An amazing variety of creatures live there. About 360 different species of birds have been sighted in the park. Nearly 300 different species of fish have been identified. About 40 species of mammals and 50 species of reptiles inhabit the park. Nature still rules in the Everglades, a place worth understanding, appreciating, and protecting.

1. What was the Everglades like before the 1900s?

A．Naturally wild.	B．Partly explored.
C．Completely lifeless.	D．Thickly populated.

2. What problem did new residents cause for the Everglades?

A．A cycle of flooding.

B．Pollution of freshwater.

C．Possible extinction of native species.

D．The extension of historic boundaries.

3. Why are the figures mentioned in the last paragraph?

A．To attract visitors to the park.

B．To stress the great power of nature.

C．To call for more efforts to protect nature.

D．To show the successful conservation of the park.

4. What is the text mainly about?

A．How people adapted to life in the Everglades.

B．How Everglades National Park was established.

C．How humans harmed and saved the Everglades.

D．How the ecosystem of the Everglades was formed.

2 . We love our pets. In fact, for most people they are more than me re pets and become more like family members. It is likely then that their owners, at some point, are going to want photographs of their furry friends. However, pet photography presents its own special problems.     1     If you’re thinking of trying pet photography, here are a few pointers to get you started.

Find out about your subject’s personality and habits. Where does it nod off if the sun is out? What is its favourite toy?     2     It’s also worth spending a little time getting to know the animal yourself. Cats, dogs, horses, they all have personality, and you need to ensure they are comfortable being around you, and you around them.

    3     If the pet is comfortable with you, and if it isn’t too nervous, fill the frame with the pet’s face. Get the eyes nice and sharp. Just like humans, this is a natural point of focus, although focusing on the nose or mouth of a dog or cat can also make for an interesting image in its own right.

See the world from pets’ perspective. If you photograph a pet while you’re standing up, all you’re going to see is the top of their head and their backs, not what you want for a portrait. Get down to their eye level. Try pre-focusing your camera and just holding it at ground level so you can look up at the pet.     4    .

Bring a flash with the owner’s permission. While greeting or playing with a new pet, fire a couple of test flashes away from them to see their reaction. In daylight particularly, they never seem to mind the flash at all.     5    .

A．Think about getting in close to your subject.

B．It’s worth a try just for a new angle on things.

C．Animals can be unpredictable, lazy, aggressive and excitable.

D．A good photograph focuses on the subject and not the background.

E．If they do mind, then stick with natural light and use a white reflector.

F．The more you shoot, the greater your chances of hitting that perfect shot!

G．Take time to chat with the owner and observe your subject to gain some insight.

5 . 听下面一段较长对话，回答以下小题。
1. What’s the conversation mainly about?

A．Fighting fire.

B．Detecting fire.

C．Preventing fire.

2. What can we know from the conversation?

A．Australia lost 4% of its trees.

B．The system is used in America.

C．The system will use heat cameras.

3. What size of fire can the new system discover?

A．The size of a car.

B．The size of a plane.

C．The size of a football field.

4. What is the woman’s concern besides trees?

A．Protecting humans.

B．Purifying the air.

C．Saving animals.

6 . Any schoolchild knows that a whale breathes through its blowhole. Fewer know that a blowhole is a nostril (鼻孔) slightly changed by evolution into a form more useful for a mammal that spends its life at sea. And only a dedicated expert would know that while toothed whales, such as sperm whales, have one hole, baleen (鲸须) whales, such as humpback and Rice whales, have two.

Even among the baleen whales, the placing of those nostrils differs. In some species they are close together. In others, they are much further apart. In a paper published in Biology Letters Conor Ryan, a marine biologist at the Scottish Association for Marine Science, suggests why that might be. Having two nostrils, he argues, helps whales smell in stereo (立体空间).

Many types of baleen whales eat tiny animals known as zooplankton (浮游动物), which they catch by filtering (过滤) them from seawater using the sheets of fibrous baleen that have replaced teeth in their mouths. But to eat something you first have to find it. Toothed whales do not hunt by scent. In fact, the olfactory bulb—the part of the brain that processes smell—is absent in such creatures. But baleen whales still have olfactory bulbs, which suggests smell remains important. And scent can indeed give zooplankton away. Zooplankton like to eat other tiny creatures called phytoplankton (浮游植物). When these are under attack, they release a special gas called dimethyl sulphide, which in turn attracts baleen whales.

Most animals have stereoscopic senses. Having two eyes, for instance, allows an animal to compare the images from each in order to perceive depth. Having two ears lets them locate the direction from which a sound is coming. Dr Ryan theorized that paired blowholes might bring baleen whales the same sorts of benefits.

The farther apart the sensory organs are, the more information can be extracted by the animal that bears them. The researchers used drones to photograph the nostrils of 143 whales belonging to 14 different species. Sure enough, baleen whales that often eat zooplankton, such as the North Atlantic right whale, have nostrils that are farther apart than do those, such as humpback whales, that eat zooplankton occasionally. Besides allowing them to breathe, it seems that some whales use their blowholes to determine in which direction dinner lies.

1. What do we know about whales’ nostrils according to the first two paragraphs?

A．They are adapted ones.	B．They are developed merely for smell.
C．They are not easy to detect.	D．They are fixed universally in numbers.

2. What plays a role when baleen whales hunt zooplankton?

A．The teeth that baleen whales have.

B．The smell that phytoplankton send.

C．The sound waves that zooplankton create.

D．The chemical signals that zooplankton give off.

3. How is the concept of stereoscopic senses explained in paragraph 4?

A．By quoting a theory.	B．By using examples.
C．By making contrast.	D．By making inferences.

4. What is the position of nostrils related to according to the last paragraph?

A．The sense of smell.	B．The possibility to attract food.
C．The ability to locate food.	D．The ability to communicate.

7 . How do the cat and the dog get along?

A．In a friendly way.

B．They often fight against each other.

C．They don’t seem to like each other.

9 . The Seychelles — that remote island chain off the coast of northern Africa is heaven for scuba divers (水肺潜水). With more than 100 islands, most of which are uninhabited, and a relatively small amount of tourists impacting the oceans and beaches, the Seychelles has some truly best scuba diving.

Fisherman’s Cove Reef

If you’re a beginner diver who loves gentle drop-offs and sea turtles, make sure Fisherman’s Cove Reef is on your scuba diving radar. The site is very popular as there’s rarely a current, it’s very shallow, and has a colorful reef with everything from eagle rays to small leaf fish, which can be very difficult to find against the seagrass and coral.

Ennerdale Wreck

If you love wreck diving, head right for the Ennerdale, a British oil tanker that accidentally sunk in 1970. Because of the medium-to-strong current and depth, it’s for divers with advanced open water cert. They’ll be able to swim around the wreck’s propellers, penetrate the frame, and likely see reef sharks and the occasional bull shark.

Baie Ternay Marine Park

The shallow, protected area of ocean has healthy and varied coral, and a lively reef. Both snorkelers and beginner divers are likely to see sea turtles grazing on the seagrass, coaching reef fish, and small eels poking out of the sandy ocean floor.   

Aldabra Atoll

It doesn’t get much more remote than the Aldabra Atoll, a UNESCO site. The coral reef continues underwater, which makes all the island’s dive sites stunning. Advanced divers can do drift dives in a channel with a chance of seeing sharks, while beginners can stay closer to the reefs, checking the various species of marine life in the Indian Ocean off their must-see list. The island is home to nearly 100,000 giant tortoises, as well as several other rare species

1. Why is the Seychelles known as heaven for scuba divers?

A．Its close distance to northern Africa.	B．The high chance to spot the fish in the region.
C．Its relatively small number of inhabited islands.	D．The effect of the oceans and beaches on tourism.

2. What makes Ennerdale Wreck appealing to divers?

A．The chance to see a sunken ship under the ocean.	B．The numerous sharks and large marine creatures.
C．Its remote location away from the main islands.	D．Its attraction to both snorkelers and divers.

3. Which place is suitable for both beginners and advanced divers?

A．Aldabra Atoll.	B．Ennerdale Wreck.
C．Fisherman’s Cove Reef.	D．Baie Ternay Marine Park.