1 . 阅读下面短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出 提示词的空白处用括号内所给词的正确形式填空。

A new study shows rapid decline in insect populations. A growing number of the Earth’s insect population now can     1     (see) only in collections on exhibitions. Nobody’s seen those for 400 years. A new review of over 70 studies of insect populations     2       (suggest) that human pressures are causing insect populations to decrease by as much as a quarter every decade. The loss of species is inevitable (不可避免的) because often we don’t know     3     those species are doing or how other species are depending on them.

3 . 阅读下面短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Pandas     1     (live) in China for over three million years. A giant panda has a typical bear’s body but is a distinctive black and white color, with black fur around the eyes and on the cars, legs, chest and shoulders, while the rest of the body is white. Giant pandas are the     2     (nation) treasure of China. A panda’s daily diet consists almost     3     (entire) of bamboo. Sometimes, however, they do not just eat bamboo. Only about 1% of their diet consists of other plants and even meat such as small rodents (啮齿动物).

4 . Nature can be unforgiving, especially when it comes to the animal world. As such, squirrels need every advantage they can get in order to protect themselves from a variety of predators that may want to make them their next meal. Squirrels pay incredibly close attention to their surroundings, and they pick up alarm calls from other nearby animals in reference to nearby predators. Now, a new study reveals that squirrels also listen to nearby birds’ conversations to make sure there is no threat close by.

Researchers from Oberlin University say that if the talk from birds is relaxing and normal, the squirrel knows it is not in immediate danger. The authors said that squirrels were listening to bird conversations and sounds to assess their safety, so in order to test their theory they observed the behavior of 54 wild Eastern gray squirrels scattered across various parks and areas in Ohio.

First, a threat was shown by playing a record of a red-tailed hawk(鹰), an animal known to hunt and eat both squirrels and other smaller birds. Then, researchers played one of two different recordings; one recording was of many songbirds chattering among one another happily, and the other was with no bird noises. After playing these recordings, each squirrel’s behavior was monitored for three minutes.

As expected, after hearing the initial record, all the squirrels displayed defensive attitudes, such as running away, looking around, or freezing their movements. Interestingly, the squirrels that heard the happy sounds of songbirds returned back to a normal, relaxed state much faster than the other group that heard the quiet sounds.

The study’s authors say that this indicates squirrels use the sounds of nearby animals to ensure their own safety. This allows the squirrel to either get back to what they were doing in a faster manner, or prepare for potential threats more efficiently.

“Perhaps in some circumstances, cues of safety could be as important as cues of danger,” the study reads. The study is published in the scientific journal PLOS ONE.

1. What does the underlined word “predators” mean in the first paragraph?

A．Animals that hunt squirrels as food.

B．Animals that make friends with squirrels.

C．Animals that hunt squirrels and birds at night.

D．Animals that steal the food from the squirrels’ nests.

2. What will the squirrels do after hearing the sound of a red-tailed hawk?

A．They will stay and freeze.

B．They will behave normally.

C．They will keep on their guard.

D．They will look around and run away.

3. How did the researchers get the result?

A．By studying the different data.

B．By listing the different figures.

C．By comparing the different responses.

D．By playing different games with the squirrels.

4. What is the best title for the passage?

A．Three interesting experiments.

B．Squirrels listen to birds to stay safe.

C．Judging danger from nearby sounds.

D．Squirrels can record the dangerous sound.

5 . Ecofriendly replacement products for single-use plastics are appearing everywhere. But have you heard of edible (可食性的) straws? Now EQUO, a new eco-friendly company in Vietnam has come up with a natural edible solution to plastic or paper straws.

The edible straws are completely plastic free, nontoxic, chemical free, and 100 percent biodegradable according to a company press release.

“It’s well known that plastic straws are harmful to the environment. Most of the 500 million used every day in America end up in oceans where they pollute water and harm marine life. Currently over eight billion straws pollute the world’s beaches,” said Marina Tran-Vu in the press release. “Although there are some plastic and paper straw alternatives on the market, most are environmentally harmful, and we were also unsatisfied with the quality and lasting of paper straws.”

All of the materials are locally from regions that support sustainable farming according to the company’s website and they struggle to have zero-net influence by” using the power of mother nature”. The name of the company was created by combining “ECO” — meaning environmentally friendly — with “STATUS QUO” — meaning the existent state. EQU stands for creating products that have minimal influence on the environment. The company was first shown on Kickstarter on May 18 and hit their funding goal in only 30 days.

Many countries are banning single-use plastics. The EU banned 10 single-use plastic products including straws that will take effect in 2021. Other items that will no longer be made of plastic include cutlery (餐具), and balloon sticks. These 10 items make up a large percentage of ocean waste that harms marine life.

So do your part, use biodegradable cutlery — you can carry your own , edible straws, and reusable water or coffee cups. These small items can contribute to reducing plastic waste.

1. What is the third paragraph mainly about?

A．The popularity of plastic straws.

B．The harm of plastic straws.

C．The pollution of beaches.

D．The necessity of change.

2. What does ECO stand for?

A．It means the original aim.

B．It means the existent state.

C．It means how to create products.

D．It means being good for the environment.

3. What can we expect in Europe after 2021?

A．Plastic straws will be forbidden.

B．Edible straws will be sold cheaply.

C．Ocean waste can be rid completely.

D．Single-use plastic products will disappear.

4. Which word best describes the author’s attitude to biodegradable cutlery?

A．Skeptical.

B．Objective.

C．Tolerant.

D．Approving.

8 . 听下面一段独白，回答以下小题。
1. What is the focus of the announcement?

A．The warning of a natural disaster.

B．The place to buy food and drinks.

C．Some ways of entertainment at the hotel.

2. Which place does the speaker tell people to go to?

A．The beach.

B．The hotel rooms.

C．The underground floor.

3. What should guests bring with them?

A．Shoes.

B．Bags.

C．Food and water.

4. Who will be waiting for the guests?

A．The government official.

B．The safety officer.

C．The hotel staff.