20．It is illegal for a public official to ask people for gifts or money ____________favors to them．

　　　 A．in preference to　 B ．in place of　 　 C．in agreement with　　 D．in exchange for

19．-Have you got any idea for the summer vacation?

　　 -I don’t mind where we get ______ there’s sun, sea and beach.

A. as if　　 　　　B. as long as　　　 C. now that　　 　D. in order that

18．Hearing the dog barking fiercely, away　　　 ．

　　　 A．the thief fled　　　　　　　　　 　　 　　　　B．was the thief fleeing

　　　 C．the thief was fleeing　　　　　　　　　　　　　　　 D．fled the thief

17. It’s going to rain, Xiao Feng. Will you please help me 　　　　the clothes on the line?

　 A. get off　　 　　B. get back　　 　　C. get in　　 　　D. get on

16．When you finish your work, don’t forget to put the tools back where they ________．

　　　 A．are　　　　　 B．will be　　　　　 C．were　 　　　　　D．had been