Although he has become rich, he is still very （ ）of his money.
A.economic B.thrifty C.frugal D.careful
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The scientists have made an （ ）study of the viruses that cause the disease.
A.exhausted B.exhausting C.exhaustive D.exhaustion
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A.often complain about B.attitude of the staffs in C.by keeping them from being D.than in assisting E.没有问题
I usually visit my parents two or three（1） a year. How（2） do you go home tosee your family?句意: 我经常一年去看我父母两到三次。你多久一次回家看你家人？
My brother let a help him repair his car over the weekend. He knows that I’m not very familiar with car engines, and I told him that I had other things to do，but he insisted thatgive him a hand.
A.let a help B.repair his car over the weekend. C.familiar with car engines D.insisted that give him a hand. E.没有问题
Foreign disinvestment and the （ ）of South Africa from world capitalmarkets after 1985 further weakened its economy.
A.displacement B.elimination C.exclusion D.exception
