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北交《大学英语上》在线作业二-0003 红字部分为答案！
单选题
1.Women workers wear hats ____________their hair gets caught in the machinery. A.if
B.in case C.unless D.because
2.Do ____________you are told; otherwise you will be punished. A.that B.what C.which D.whom
3.That tree looked as if it____________for a long time. A.hasn't watered
B.hadn't been watered C.didn't water D.wasn't watered
4.Hans has a new car. I wonder when____________it. A.he bought B.did he buy C.buys
D.he is buying
5.The company official ____________ I thought would be fired received a raise. A.whom B.whoever C.who D.which
6.— Who is John Smith? — He is the speaker ____________ heard last week. A.which we would have B.we would have C.we
D.we had
7.Students in his class cannot understand A.what does the sentence mean B.what means this sentence C.what this sentence means
D.what is the meaning of the sentence
8.The reason we're so late is ____________. A.for the car breaks downr
B.due to the car breaking down