我们都知道语法词汇的重要性，这就需要同学们平时多加训练，环球博海小编特整理了2013年英语四级语法词汇强化习题(21) ，希望能够帮助到大家!

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

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

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

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

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

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

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

　　A.fountain B.fix C.tight D.fasten

　　195.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

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

　　A.sore B.purchase C.glow D.faint

　　197.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

　　198.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

　　199.Many English words are _______ from Latin.

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

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

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