1. 结合语境，根据汉语或首字母提示用单词的适当形式填空。

1. （1） A series of incidents suggest that drug a is such a serious problem as we should deal with properly.
3. （2） The importance of communication between people cannot be s too much.
5. （3） In my opinion, smoking should be completely b because it is closely related to lung cancer.
7. （4） Four out of five parents worry that their children will become a to the Internet.
9. （5） People who live in these areas have become a to the cold climate.
11. （6） The new traffic rules that took e on January 1 are much stricter than those in the past.
13. （7） We were all d at the news that our picnic was cancelled because of the rain.
15. （8） (自动的) Teller Machine (ATM) is a machine connected to the bank's computer system allowing customers to access their accounts.
17. （9） The article offers some ways to (加强) our memory power.
19. （10） I decided not to leave John alone when he was in such a (绝望的) position.
21. （11） He felt (羞耻的) for having spoken so cruelly.
23. （12） Mark said that he was (不适合的) for the job, so he decided to leave the company.
25. （13） Tired and (气喘吁吁的), we reached the top of the mountain and looked at the beautiful views.
27. （14） As is known to us, physical activity and exercise can improve our (精神上的) health.
29. （15） One research report has shown that listening to music influences (理解) of reading.