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　　解析：因the computer与repair是被动关系，排除A;又因only加状语置于句首，要用部分倒装，排除选项D和B;故选C。

　　将固定短语中的名词作主语来增加句子理解难度

　　Good care must ______babies, particularly while they are ill.

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

　　解析：由固定短语take good care of(好好照看) 是可知，good care与take是被动关系，排除A和B;选项C中又漏掉了of;故选D。

　　在语境中将语态与时态结合起来命题

　　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与persuade是被动关系，排除A和B。又因为主语是一般将来时，条件句中用一般现在时，所以选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与jobs是被动关系，排除A和D;又因条件状语从句是一般现在时，主句中的谓语动词应当是一般将来时，故选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) 与wash away(冲走) 是被动关系，排除C;又因quantities of…作主语，谓语动词用复数，排除B;指近阶段(近些年) 正在发生的事，用现在进行时，排除A;故选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