20．-Shall I lock the lab now before I go home?

　　 --- 　　　　　. I’ll check it myself later.

　　　 A．Go ahead　　　　　 B．No problem　　　 C．No hurry　　　　　 D．Don’t bother

19．Steven’s exam results put him _________ the top ten students in his grade.

　　　 A．among　　 B．between　 C．in　　 D．at　　

18．I need to call my friend David _________ coat I walked off by mistake yesterday.

　　　 A．in whose B．in that　　　 C．with which　　 D．with her　　

17．-I did very well in the English exam last week.　

　　　 -I did _________ . I got a full mark.

　　　 A．no better B．not better　　　 C．no worse　　　 D．even worse

16．China is known _________ greatly in terms of its cultural values over the past few years.

A．to change　　　 B．having changed　　 　 C．changing　　 D．to have changed

15.People _________ hobbies which offer enjoyment, knowledge and relaxation.

A. bring up　 　　　　　　 B. set up　 　　　　　　 C. pick up　 　　　　　 D. take up　　

14. I don’t think we’ve met before. You’re taking me for ______.

A. some other　 B. someone else　　　　 C. other person　　　 D. one other

13．Only when Tom fully recovered 　　　　back to work.　

　　　 A．did he go 　　　　 B．he went　　　　　　 C．had he gone　　　 D．he had gone

12. After five days’ climbing in the mountain, they reached ____ they thought was the place they’d been dreaming of.

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