2 . 我已经意识到了问题的严重性。
I ________________ of the problem.

3 . 选词填空

speaking of，burn down，be aware of，fill in/out，wind up，come across

1. ________________ my class, I have to say that I can’t stand some classmates’ selfishness.
2. Please ________________ your address at the bottom of the application form.
3. Parents should ________________the fact that children, who are raised on a diet of soap operas and online games, seldom, if ever, participate in a variety of activities.
4. When walking down the street, I ________________ David, whom I hadn’t seen for years.
5. Do turn off the gas when you are out, or you might ________________ the house.

4 . We’re increasingly aware ________________the fact that we can’t control Earth systems with engineering alone, and realizing that we need to moderate(调节) our actions if we hope to live in balance. (用适当的词填空)

6 . We must _________ (意识到) the importance of environmental protection in preserving biodiversity and preventing the extinction of endangered wildlife species. (根据汉语提示完成句子)

7 . To effectively protect endangered species, we must ____________________ (意识到) the threats they face and the actions needed to mitigate them. (根据汉语提示完成句子)

9 . 选词填空

stop...from doing, end up doing, be anxious for, end up with, set out, be aware of, be anxious about, do away with

1. It was raining when we ____________, which affected our mood.
2. Children always seem to enthusiastically ____________ the New Year to come.
3. The government should be determined to ________ the river ________ polluted.
4. That city is determined to ____________ overhead wires.
5. All our ambitious intentions ____________ nothing.
6. How can Alice ____________ only one packaging?
7. The host doesn't seem to ____________ the coldness of their attitude towards his appeal.
8. There is no reason to ____________ the presentation.