1 . If you’re a camping lover, the scenery of the following campsites will provide you with an experience that you will never forget.

North Rim Campground, Grand Canyon, Arizona

Address: North Rim, AZ 86052, USA

Camping in the famous Grand Canyon, with its layers of million-year-old red rock, is the favorite thing for many people. After all, it is one of the Seven Natural Wonders of the World. You will see rural views of the canyon which is shaded by towering pines. And it is home to vast wildlife including wild wolves and deer.

Apgar Campground, Glacier National Park, Montana

Address: US Hwy 2, West Glacier, MT 59901, USA

There are plenty of original forests, mountain meadows, lakes, and rocky mountains in Glacier National Park. Adventurous visitors and campers visiting Montana enter a hiker’s paradise when coming here. Apgar Campground is situated among the trees and wildlife there ranges from mountain goats to grizzly bears.

Watchman Campground, Zion National Park, Utah

Address: UT-9, Springdale, UT 84767, USA

Located a quarter-mile from the south entrance of Zion National Park in Utah, Watchman Campground is surrounded by hug sandstone cliffs, tall rocky peaks and pines. There is the Virgin River near the campgrounds, allowing campers access to bike trails along the riverbank plus hiking to a nearby archeological (考古学的) site.

Hidden Valley Campground, Joshua Tree National Park, California

Address: California 92277, USA

For campers wanting to enjoy a unique experience in the desert, sleeping under the starry skies and surrounded by cacti and rock formations, Joshua Tree National Park is the answer. The campgrounds and park become even more breathtaking at sunset when the colors of the sky are noticeable against the vast ground.

5 . Year 2020 has witnessed the nation’s battle with the novel coronavirus pneumonia (肺炎). To prevent the _________ from spreading further, people from all over China have been making changes to their everyday lives.

Most people take their _________, wear masks, wash their hands often and don’t go out _________ it’s necessary. One of the most _________ changes was that many Chinese people didn’t _________ to celebrate the Spring Festival, a tradition that _________ over 4,000 years ago.

Indeed, people have _________ chosen to stay home to prevent further human-to-human spread.

The situation is quite unusual. Many schools and places of work have _________ their return date, although that didn’t stop _________ and students from working and studying at home.

February 17 was planned to be the first day of the new term. On that day, many teachers began __________ online lessons. Bored at home, some people began to learn new things to __________ their newfound time, such as baking a cake or knitting a sweater.

The film Contagion (2011) showed the worst-case scenario (可能的情况) after a worldwide epidemic. Fortunately, the situation in China couldn’t be more __________ than the movie. Rather than __________ and food storage, everything has worked out rather well in China so far. More than 30,000 healthcare workers in over 100 medical teams gathered and thousands of __________ workers came to build hospitals in Wuhan, Hubei province. Thousands of volunteers are working nonstop to help deliver supplies and ________ the affected regions.

It’s not the first time people have come together during a natural __________. When Hurricane Katrina hit the US in 2005, over 60,000 people, from both the affected communities and outside it, __________. These helpers brought food and water, removed waste and searched for __________ victims on rooftops.

“It’s a popular myth (谬见) that when disasters strike, people fall into __________. In reality, we’re more likely to rush in to help others than run past them to __________ ourselves,” wrote American psychologist Kelly Caldwell in Pacific Standard. “It’s an exercise in mass healing (集体治疗).”

Forests of longleaf pine trees once covered two-thirds of the southeastern US. About 95% of those forests     1    （cut）since the beginning of the last century. But now these forests are returning.

The wood of the tree is very strong. Most buildings in the southern US used to contain longleaf pine wood. Today, after longleaf pine is no     2    （long） wanted to build houses, people are reusing the wood because it’s still good and resists water and insect damage. The tree is also     3    （value）to the environment since it stores CO₂ in its wood.

The US government has several programs to protect and expand longleaf pine forests, one of     4     is the Safe Harbor Program.     5     uses voluntary agreements with private landowners     6    （help）endangered animals. Now, farmers and landowners     7    （live）in the southeastern US are growing new longleaf pine trees. Instead of cutting the trees     8     wood, they are finding ways to make money from the forest of trees. One way is by selling the     9    （leaf）or needles of the trees as a ground cover. Another way is to sell hunting rights. Hunting wild pigs     10    （be） a popular sport in the southern US and the fight to hunt on land can cost from $200 to $1,000 a day.

9 . Nobody wants to snack on plastic bags or soda rings, but according to a recent study from the University of Neweastle, we could be consuming roughly a credit card's worth of plastic every week.

Microplastic, which are less than a quarter-inch size and come in various shapes, have polluted the natural world and infiltrated(渗入)our bodies. The first clue to microplastic exposure in humans came around 2013, when scientists discovered plastic particles in seafood prepared for consumption. But in 2019, when the University of Newcastle study was published, the scientific community understood that the problem was considerably broader. Microplastics shed off clothes and tires and have been found in beer, honey, table salt and other food items. We breathe in plastic staying in the air and drink plastic floating in our drinks. It's no stretch to conclude that our exposure is significant. What we don't know is what this means for us.

The amount of evidence collected on this subject is growing rapidly, according to Scott Coffin, a toxicologist(毒理学家). Studies done on mice and rats have found that plastic in their bodies can severely damage cells and cause stress.

Because microplastics are too small to clean up, the only solution is to stop plastic waste at the source. And doing so would take a thorough adjustment, given that plastics are deeply embedded in our economy and lifestyle. Stopping using them would fundamentally affect countless industries, including textiles(纺织业), transportation and manufacturing.

"I think we need to have more studies coming out that are directly related to human health before we see a lot more concern from the general public," Scott said. "It takes a lot to convince people that something that is really convenient for them to use is something they should sacrifice."

The question of microplastics and human health needs more attention—from the scientific community ,the general public, the government and funding groups. The issue isn't being ignored, but it's not being prioritized either.

A male elephant that broke away from the wandering elephant pack     1    ( send) back to its forest home on Wednesday in Xishuangbanna Dai Autonomous Prefecture, southwest China's Yunnan Province, local authorities said.

Yuxi City headquarters in charge of monitoring the pack's migration (迁徙) took the     2     (decide) early Wednesday morning     3     ( prevent) the lone animal from entering heavily populated areas. At 3 p. m.，the elephant was caught and returned to the nature reserve. The animal appeared     4     (health) and did not suffer from any injuries.

The pack of 15 wandering wild Asian elephants travelled about 500 kilometers north from their forest home. The male elephant separated from the pack on June 6, and moved around in the     5     (city) of Kunming, Anning and Yuxi, with an activity area of 140 square kilometers and a walking distance of 190 kilometers. It had relied mainly on     6     was provided by the locals. The     7    (remain) 14 elephants have been moving southward recently but are still far from the reserve.

Asian elephants are     8     A-level state protection in China, where they are     9     (most) found in Yunnan. Thanks to determined protection efforts in recent decades, the wild elephant population in     10     province has grown to about 300, from 193 in the 1980s.