解析：因the computer與repair是被動關系，排除A;又因only加狀語置于句首，要用部分倒裝，排除選項D和B;故選C。

　　將固定短語中的名詞作主語來增加句子理解難度

　　Good care must ______babies, particularly while they are ill.

　　A. take B. take of C. be taken D. be taken of

　　解析：由固定短語take good care of(好好照看) 是可知，good care與take是被動關系，排除A和B;選項C中又漏掉了of;故選D。

　　在語境中將語態與時態結合起來命題

　　1. The number of deaths from heart disease will be reduced greatly if people ______to eat more fruit and vegetables.

　　A. persuade B. will persuade C. be persuaded D. are persuaded

　　解析：因people與persuade是被動關系，排除A和B。又因為主語是一般將來時，條件句中用一般現在時，所以選D。

　　2. Hundreds of jobs ______if the factory closes.

　　A. lose B. will be lost C. are lost D. will lost

　　解析：因lose與jobs是被動關系，排除A和D;又因條件狀語從句是一般現在時，主句中的謂語動詞應當是一般將來時，故選B。

　　3. With more forests being destroyed, huge quantities of good earth ______each year.

　　A. were washed away B. is being washed away

　　C. are washing away D. are being washed away

　　解析：因good earth(沃土) 與wash away(沖走) 是被動關系，排除C;又因quantities of…作主語，謂語動詞用復數，排除B;指近階段(近些年) 正在發生的事，用現在進行時，排除A;故選D。

　　4. —The window is dirty. —I know. It ______ for weeks.(www.yygrammar.com)

　　A. hasn’t cleaned B. didn’t clean C. wasn’t cleaned D. hasn’t been cleaned

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