13.The police stopped him because he_____ the traffic regulation.

　　A. damaged B. destroyed C. broke D. corrupted

　　14.All too________ it was time to go back to school after the glorioussummer holidays.

　　A. fast B. soon C. quick D. often

　　15.The chief manager refused to_________ on the rumor that he was going to retire.

　　A. explain B. comment C. speak D. talk

　　16.Mr?Brown gradual1y_________aknowledge of the subject.

　　A. required B. inquired C. achieved D. acquired

　　17.If I am not _________ when you come to my office，ask for my secretary.

　　A. suitab1e B. available C. comfortable D. proper

　　18.peasants supp1y workers with food， and workers________ supply peasants with manufactured goods.

　　A. in turn B. by turn C.for return D.by return

　　19.Let's go out during the break to_________ our legs。

　　A. stretch B. expand C. move D. extend

　　20.I have just___________abeautiful poem in that little book.

　　A. come to B. come through C. come across D. come up

　　1.A 2.D 3.A 4.D 5.D 6.C 7.B 8.A 9.C 10.D 11.D 12.A 13.C 14.B 15.B 16.D 17.B 18.A 19.A 20.C