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51.When making modern cameras , people began to _______ plastics for metal.

A. surround B.substance C.stretch D.substitute

52.With the help of the government , a large number of people ---_______ after the flood in 1991.

A. survived B.suspended C.suffered D.subfected

53.He always has a lot of _______ ideas in his mind , and sometimes we do not even know what he is thinding about.

A. novel B.spoil C.acceptable D.additional

54.Please be serious. I am not _______. You should consider it carefully

A. sorting B.joking C.counting D.comparing

55.We do not have a _______ school in our institute. The highest degree we provide for the students is a B. A. and a B. S. .

A. continue B.bay C.assistance D.graduate

56.In the United States, the foreign policy is decided by the ________ government, not by each state.

A. federal B.figure C.scientific D.service

57.He works in our university as a visiting _______, not as a formal faculty member.

A. traditional B.scholar C.nurse D.pilot

58.When you fill in the application form, please use your _______ address so that we can contact you easily later.

A. policy B.plain C.permanent D.principal

59.John _______ to be a polite man. But in fact he is very rude.

A. pretends B.assures C.affords D.melts

60.We can not trust him any more because he often ________ his duty. 

A. owes B.spoils C.deserts D.neglects

【答案】51.D 52.A 53.A 54.B 55.D 56.A 57.B 58.C 59.A 60.D

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