题目内容
20．The computer requiresfixing（fix）．It doesn't work any more．分析 电脑需要修理，它不再工作了．
解答 答案：fixing．
结合句意是说电脑坏了，需要修理，是被修理，require表示需要，后加动名词表被动，所给单词fix是动词修理，动名词是fixing，故答案是fixing．
点评 在need，want，require几个表示"需要"的动词后，英语习惯上用动名词的主动形式表示被动意义．如：
He needs encouraging．他需要鼓励．
Your hair wants cutting．你需要理发了．
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