8. Alice is so careful that she always goes over her test　 papers to ____ there are no mistakes.

　 A. look for　 　B. make sure 　　C. find out 　　D. think about

7.--Do you know him well?---Sure, we _____ friends since ten years ago.

A. were　 　B. have been　 　　C. have become　 　　D. have made　

6.If you don’t go to the meeting tomorrow,_____.

A. he will, too　 　B. he doesn’t, either　　 　C. he won’t,either 　　D. he does, too.

5.I am a League Member. So I volunteer my time _____ others.　

A. helping　 　B. to help　 　C. help　　 　D. helped

4. ---Who has ever seen the film “Yellow River Fisherman” ?

　 ---_____. All of us will see it next weekend.

　　 A. No one　　 B. None　 　C Not one　 D. not everyone

3.This is the library _____ my brother goes once a week.

A. that　　 　B. which　　 　　　 C./　　 　 D. where

2. ---Would you like some coffee? ---Yes, please.

　 ---Do you have any milk? I prefer coffee _____milk.

A. with　　 　B. to　 　　　C. from　　 　D. for

1.I’d like to trek ______ the jungle because I like exciting vacations.

A. across　 　　B. through 　　　C. cross 　　　D. though

25．图17卡通画中，电路一只接通，哪只鸟有触电危险?哪只鸟相对安全?请分别说明理由。

24．在框中画出可调亮度台灯的电路图