1 . 阅读下面短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Global warming refers to the fact that the earth's atmosphere is warming near     1     (it) surface — in other words, it's getting hotter. Some scientists say it is human activity     2     has caused global warming. However, there are other theories as well.

One popular theory relates to the “greenhouse effect”. Gases that make up the atmosphere are similar to     3     greenhouse because they allow sunlight     4     (pass) through, and then trap much of the heat from     5     (escape). This naturally occurring phenomenon,     6     is called greenhouse warming, keeps the earth's surface     7     (warm) than it would be.

While scientists agree that human-produced compounds (化合物) like carbon dioxide and others are being released into the atmosphere, some argue it's not clear how this results     8     the changes in temperature.

Global warming can     9     (great) affect human life on many levels. Scientists have made great     10     (contribute) to finding out how long the earth has been warming, at what rate it is warming, and what factors are causing it. These answers may better prepare people to handle its effects.

2 . Masks that helped save lives during the Covid-19 pandemic （疫情）are proving a deadly risk for wildlife, with birds and sea creatures trapped in many facial coverings in animal habitats.

Single-use masks have been found on the ground, waterways and beaches worldwide since countries required （heir use in public places to slow the pandemic's spread. Worn once, the thin protective materials can take hundreds of years to break down. "Face masks aren't going away any time soon-but when we throw them away, these items can harm the environment and the animals who share our planet," Ashley from anima! rights group PETA said.

Monkeys have been found playing with used masks in the hills outside Malaysia's capital Kuala Lumpur. And in an incident in Britain, a seagull was saved in Chelmsford after its legs got caught in an abandoned mask for a week.

However, the biggest influence is in the water. More than 1.5 billion masks made their way into the world's oceans last year, accounting for around 6200 extra tons of ocean plastic pollution, according to environmental group OceansAsia. “Masks and gloves are particularly problematic for sea creatures," says George Leonard, chief scientist from NGO. "When those plastics break down in the environment, they form smaller and smaller particles （颗粒）.Those particles then enter the food chain and influence the entire ecosystem,“ he added.

Campaigners have urged people to deal with masks properly after using them. OceansAsia has also called on governments to increase punishment for littering and encourage the use of washable masks.

1. What bring（s） a great danger to wildlife now?

A．Waste masks.	B．Covid-19.
C．Polluted water.	D．Damaged habitats.

2. What does the underlined word “problematic” in paragraph 4 mean?

A．Important.	B．Attractive.
C．Common.	D．Troubling.

3. What can we infer from the text?

A．Monkeys learned to wear masks from humans.

B．Plastics are less harmful after becoming particles.

C．Used masks have a worse effect on sea creatures.

D．Waste masks are the main ocean plastic pollution.

4. How should we solve the problem from the last paragraph?

A．Keep masks after they' re used.

B．Call on governments to stop littering.

C．Punish those who wear single-use masks.

D．Put used masks in the recycling box.