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1.The man's income is twice that of the woman.

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1.The man's income is twice that of the woman.
A.as much as B.much as C.as many as D.much than
2.It is __ beautiful house that we've decided to buy it.
A.such B.such a C.so a D.so
3.your son is well again,you have nothing to worry about.
A.Because B.That C.Since D.For
4.The population of many Alaskan cities has ______ doubled in the past three years.
A.larger than B.as many as C.as great as D.more than
5.They didn't catch the 6:30 train ______ they had been delayed by heavy traffic.
A.now that B.since C.because D.as
6.I had hardly reached the airport ______ it began to rain.
A.where B.after C.when D.since
7.People don't necessarily grow wiser ______ they grow older.
A.as B.than C.that ,D.for
8,You can stay here ________ you are quiet.
A.as long as B.if only C.though D.unless
9.The children are happy they have a new school.
A.that B.where C.since D.before
10.Everybody was assigned a job university.
A.when they leave B.if they left C.as soon as they left D.while they leave
1.A
2.B
3.C
4.C
5.C
6.C
7.A
8.D
9.A
10.C
比较:because,since,as和for
1) because语势最强,用来说明人所不知的原因,回答why提出的问题,是句子中的重要部分,常放在句末,不能用其它三个替换.逗号可加可不加.
You can trust those products because the quality never changes.
I haven”t been to the cinema lately,because I am too busy.
I didn”t go,because I was afraid.
2)当原因是显而易见的或已为人们所知,就用as或 since.since稍正式一些.
Since /As the weather is so bad,we have to delay our journey.
3) 由because引导的从句如果放在句末,且前面有逗 号,则可以用for来代替.但如果不是说明直接原因,而是多种情况加以推断,就只能用for.
He is absent today,because / for he is ill.
He must be ill,for he is absent today.
4)当because引导的从句与否定的主句连用,而主句又位于句首时,之前不用逗号,因为主句动词否定的是其后的全部内容.为了突出because从句,because 前常加上副词,如:just,only,simply,chiefly等.在这种情况下,常常会形成否定的转移.如果是在口语中,在because前要有一个停顿(逗号),才能表示出否定没有转到because从句中.如:
You should not despise a man just because he is poorly dressed.
She is not marrying Bill,because he is poor.
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