一、用方框中所给单词的适当形式填空。
certain，pollute，India，drop，ill
1. —The air in our city is becoming fresher.
—I agree. To reduce air ______，our government encourages factories to produce new energy cars.
2. (2025·无锡市宜兴期末)The number of the wolves ______ fast，because people often kill them for safety.
3. (2024·无锡市江阴校级模拟)—Do ______ people speak English?
—Not exactly! They mainly speak Hindi，but their second language is English.
4. (2025·南京市玄武区期中)Nowadays，many young people are worried about their looks. That's because they feels ______ about how they look and are less confident about themselves.
5. (2025·泰州市姜堰区期末改编)Wearing masks can keep us safe from ______. Moreover，it can keep us warm when it is cold.

pollution
; drops
; Indian
; uncertain
; illnesses

1. —The school is planning a hiking trip next week, but the weather forecast says there might be a heavy rain.
—That's a problem. Hiking in bad weather could put us ______.
A. at risk
B. on duty
C. in detail
D. under control

A

2. Thank you for ______ let me ______ your school trip.
A. agreeing to; join
B. agreeing to; to join
C. to agree; join
D. agreeing; joining

A

3. 亮点原创·DeepSeek-R1 can help students improve their studies greatly.
______ , it can analyze their mistakes and recommend exercises to them.
A. Such as
B. For example
C. Because of
D. As a result

B

4. —The new digital ID system will let people use their phones for travel and banking without physical documents.
— ______ It might also reduce the number of ID-related fraud（欺诈）cases.
A. I don't think so.
B. That's a good point.
C. Are you serious?
D. How come?

B

三、完成句子。
1. 北极熊是陆地上最大的肉食动物，但北极冰川的融化使得它们的生存更加困难。
Polar bears are ________________________, but the melting of the Arctic ice ________________________.
2. 为了保护印度犀牛，政府应该制定法律阻止人们为了获取它们的角而猎杀它们。
________________________, the governments should ________________________ them for their horns.
3. 为了野生动物们的安全，我们不应该买用它们的皮毛制成的包或鞋子。
For the wild animals' safety, we ________________________ the fur or skin of them.
4. 地球变暖并且严重的天气事件发生得更频繁，因此一些野生动物很难找到足够的食物吃。
The earth is getting warmer and serious weather events ________________________ so it's difficult for some wild animals ________________________.

the biggest meat-eaters on land
; makes
; it more difficult for them to survive
; In order to protect Indian rhinos
; make laws to stop
; people from hunting
; shouldn't ; buy bags or shoes made from
; happen more often
; to find enough food to eat