environmental damage is done.it takes many years for the ecosystem to recover.A．Eyen ifB．If onlyC．Wh——青夏教育精英家教网—

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科目： 来源：不详 题型：单选题

______environmental damage is done，it takes many years for the ecosystem to recover.

A．Eyen if

B．If only

C．While

D．Once

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科目： 来源：不详 题型：单选题

The incomes of skilled workers went up . , unskilled workers saw their earnings fall.

A．Moreover

B．Therefore

C．Meanwhile

D．Otherwise

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科目： 来源：不详 题型：单选题

The medicine works more effectively you drink some hot water after taking it .

A．as

B．until

C．although

D．if

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科目： 来源：不详 题型：单选题

I travel to the Binhai New Area by light railway every day, _____ do many businessmen who live in downtown Tianjin.

A．as

B．which

C．when

D．though

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科目： 来源：不详 题型：单选题

A good friend of mine from I was born showed up at my home right before I left for Beijing．

A．how

B．whom

C．when

D．which

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科目： 来源：不详 题型：单选题

It is obvious to the students ______ they should get well prepared for their future.

A．as

B．which

C．whether

D．that

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科目： 来源：不详 题型：单选题

Owen wouldn’t eat anything ____________ he cooked it himself

A．until

B．since

C．unless

D．while

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科目： 来源：不详 题型：单选题

-– I wonder how much you charge for your services.
--- The first two are free the third costs $30.

A．while

B．until

C．when

D．before

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科目： 来源：不详 题型：单选题

She’ll never forget her stay there ________ she found her son who had gone missing two years before.

A．that

B．which

C．where

D．when

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科目： 来源：不详 题型：单选题

11.We should consider the students’ request the school library provide more books on popular science.

A．that

B．when

C．which

D．where

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