11.This is an _______ that will not be easily forgotten.

A.impact B.academic C.insult D.alternative

12.Please _______ me for my rudeness. I really do not know the custom here.

A. engage B.comfort C.execute D.forgive

13.Water and air are _______ to human beings. We can not live without them.

A.harbour B.function C.definite D.essential

14.When the airplane takes off, the passengers are told to _______ their seat belts.

A.fountain B.fix C.tight D.fasten

15.This is not what we asked you to do. You can not get more pay for the _______ work.

A.owing B.device C.tired D.extra

16.My throat is _______. I cannot speak any more.

A.sore B.purchase C.glow D.faint

17.Many years ago, a lot of factories were _______ from big cities to the mountainous areas in case of war.

A.transferred B.transformed C.transmitted D.transported

18.He said in his letter that he would _______ some photographs but I couldn’t find anything in the envelope.

A.case B.double C.enclose D.nonsense

19.Many English words are _______ from Latin.

A.displayed B.spread C.lost D.derived

20.I feel _______ to say that I can not believe what he said.

A.wanted B.observed C.obliged D.wandered

答案：C D D D D    A A C D D