根据对话情景和内容，从对话后所给的选项中选出能填入空白处的最佳选项。

-Plastics are very useful, are’t they?

-Yes, they are.

-Plastics are often used instead of natural materials. 　1　 　

-I don’t think so. I prefer things made of natural materials.

-Don’t you know plastics are not only cheap but also light in weight?

-　 2　 　But I don’t like man?made things. I feel clothes made of silk or cotton are more comfortable than those made of plastics.

-　 3　 　

-You make a mistake about me.　 4　

-I’m sure with the development of modern science and technology there can be no trouble at all.

-　 5　

-Well, we’d better leave this problem for scientists to discuss.

A. Yes, I do.

B. You think plastics should come out of use.

C. I think plastics cannot completely take the place of natural materials anyway.

D. I think plastics may do harm to people’s health.

E. They are as good as natural materials.

F. They are being made and used almost everywhere

G. It seems that you have something against plastics.

1.　　　　 　2.　　　　 　3.　　　　　 　4.　　　　 　5.　　　　 　

10. John told me he’d like to go hiking with me, his voice joy.

A. was heavy with　 B. was full of

C. heavy with　　　 D. full with

9. - What 　　　　the children be doing?

-They　　　 　be playing a game called Bingo.

A. might; can　　 B. can; might

C. might; might　 D. can; can

8. It’s required that mineral resources　　　 　hand in hand with the local environment protection.

A. be exploited　　 B. exploit

C. have exploited　 D. exploited

7. Do you know that Britain trades 　　　　　many European countries　 furs and skins?

A. in; of　　　 B. with; in

C. with; of　　 D. in; with

6. 　　　　you have tried yourself can you learn what an exciting game it is!

A. Only if　　 B. Even if

C. If only　　 D. As if

5. Some children were seen 　　　　in the garden all the morning. It must have been who picked the flowers.

A. playing; they　　　 B. to play; they

C. playing; them　　　 D. play; them

4. We allow　　 　in the woods but anyone is forbidden here.

A. to camp; to smoke　 B. camping; smoking

C. to camp; smoking　　 D. camping; to smoke

3. Doctor Wang　　　 　at seven o’clock for the conference, but she didn’t turn up.

A. should have arrived　 B. should arrive

C. should be arrived　　 D. should be arriving