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—Computer is so useful. It can do almost everything.

—Yes, but it ______ what to do.

A.will tell

B.has known

C.must be told

D.is told

 

【答案】

C

【解析】

试题分析:根据语境可知此句的含义是电脑很有用,它几乎能做任何事情,但它必须被告诉做什么.因主语是it,是动词的承受者,故用被动语态,根据语气可知要用含有情态动词的故用C.

考点:含有情态动词的被动语态.

点评:含有情态动词的被动语态,其结构为“情态动词can/could/may/might/should/will

/shall/would/need等+助动词be+及物动词的过去分词”

 

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