—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】

試題分析：根據(jù)語境可知此句的含義是電腦很有用,它幾乎能做任何事情,但它必須被告訴做什么.因主語是it,是動詞的承受者,故用被動語態(tài),根據(jù)語氣可知要用含有情態(tài)動詞的故用C.

考點：含有情態(tài)動詞的被動語態(tài).

點評：含有情態(tài)動詞的被動語態(tài)，其結(jié)構為“情態(tài)動詞can/could/may/might/should/will

/shall/would/need等+助動詞be+及物動詞的過去分詞”

 

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