41.This is an _______ that will not be easily forgotten. A.impact B.academic C.insult D.alternative 42.Please _______ me for my rudeness. I really do not know the custom here. A. engage B.comfort C.execute D.forgive 43.Water and air are _______ to human beings. We can not live without them. A.harbour B.function C.definite D.essential 44.When the airplane takes off, the passengers are told to _______ their seat belts. A.fountain B.fix C.tight D.fasten 45.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 46.My throat is _______. I cannot speak any more. A.sore B.purchase C.glow D.faint 47.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 48.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 49.Many English words are _______ from Latin. A.displayed B.spread C.lost D.derived 50.I feel _______ to say that I can not believe what he said. A.wanted B.observed C.obliged D.wandered 答案: 41.C 42.D 43.D 44.D 45.D 46.A 47.A 48.C 49.D 50.D