A.flat B.coined C.bored D.manufactured

　　2.These two horses look so much alike that we can not _______ one from the other.

　　A.differ B.detail C.distinguish D.defeat

　　3.The president of that company was very calm during the political _______.

　　A.failure B.fashion C.proceed D.crisis

　　4._______ is usually the chief enemy of the camera lens.

　　A. Occasion B.vain C.Moisture D.Deck

　　5.The _______ left the ship after sixty hours of hard struggle.

　　A.dash B.cell C.crew D.gay

　　6.On our way to Beijing, we visited Xi'an, a city of two million _______, and stayed there for two days.

　　A. insects B.human C.inhabitants D.flights

　　7.One of the main reasons for air pollution is that many cars _______ smoke into the atmosphere.

　　A.gather B.hire C.discharge D.escape

　　8.Don't forget to _______ to let us know you arrived safely.

　　A.cable B.cage C.border D.bay

　　9.She gave him a _______ that she could not come to his party.

　　A.mistress B.shoot C.neck D.hint

　　10.When the temperature is below zero, water will _______.

　　A.freeze B.virtue C.sink D.seek

　　解析：

　　1.D

　　2.C

　　3.D

　　4.C

　　5.C

　　6.C

　　7.C

　　8.A

　　9.D

　　10.A