A.excess B.exceed C.checked D.chased

38.In the class the teacher asked the students to _______ their bad habits.

　A.weaken B.omit C.overcome D.overtake

(来源：英语聊天室 http://chat.EnglishCN.com)

39.When you study in the United States, usually you have to buy your own health _______.

(来源：英语资料下载 http://download.englishcn.com)

　A.insurance B.expense C.evidence D.payment

(来源：英语问答中心 http://ask.englishcn.com)

40.Chocolate and ice-cream have different _______. (来源：英语麦当劳www.EnglishCN.com)

　A.favour B.favourites C.fever D.flavours

(来源：EnglishCN英语博客基地)

41.This is an _______ that will not be easily forgotten. (来源：英语美食指南 http://food.englishcn.com)

　A.impact B.academic C.insult D.alternative (来源：英语美食指南 http://food.englishcn.com)

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

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

(来源：英语麦当劳－英语杂志 www.EnglishCN.com)

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

(来源：英语论坛 http://bbs.englishcn.com)

　A.harbour B.function C.definite D.essential (来源：英语麦当劳－英语杂志 EnglishCN.com)

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

(来源：英语论坛 http://bbs.englishcn.com)

　A.fountain B.fix C.tight D.fasten

(来源：专业英语学习网站 http://www.EnglishCN.com)

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

(来源：专业英语学习网站 http://www.EnglishCN.com)

　A.owing B.device C.tired D.extra (来源：最老牌的英语学习网站 EnglishCN.com)

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

(来源：EnglishCN英语问答中心[e问e答])

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. (来源：英语交友 http://friends.englishcn.com)

　A.displayed B.spread C.lost D.derived (来源：英语博客 http://space.englishcn.com)

50.I feel _______ to say that I can not believe what he said. (来源：英语博客 http://space.englishcn.com)

　A.wanted B.observed C.obliged D.wandered (来源：英语学习门户网站EnglishCN.com)

答案:
1.B 2.D 3.A 4.D 5.B 6.C 7.D 8.A 9.D 10.D 11.D 12.B 13.D 14.A 15.C 16.C 17.B 18.A 19.B 20.C 21.D 22.A 23.A 24.D 25.D 26.B 27.A 28.C 29.C 30.C 31.D 32.C 33.C 34.A 35.D 36.D 37.A 38.C 39.A 40.D 41.C 42.D 43.D 44.D 45.D 46.A 47.A 48.C 49.D 50.D
(来源：英语学习门户网站EnglishCN.com)