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:
1.B 2.D 3.A 4.D 5.B 6.C 7.D 8.A 9.D 10.D