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    5．-When is he willing to lend his friends some money？
    -Only when ______ hard enough．（　　）
    A．to pressB．pressedC．pressingD．is pressed

    分析 --他什么时候愿意借给朋友一些钱呢？
    --只有在他受的压力足够大的时候．

    解答 答案：B．
    本题的回答为省略句，其完整的句子应为"He is willing to lend his friends some money when he is pressed hard enough．"因主句和从句主语一致，且从句谓语动词是be动词，所以从句中的主语和be动词可同时省略，动词press与它的逻辑主语he之间又是被动关系，所以用过去分词pressed，故选B．

    点评 本题考察的是状语从句的省略，当状语从句的主语和主句主语一致，且含有be动词的时候，可以把状语从句的主语和be动词一起省略．到底用现在分词还是过去分词，看动词与它的逻辑主语之间的关系（主句的主语就是非谓语动词的逻辑主语），即主被动关系（主动关系就用现在分词形式；被动关系就用过去分词）．

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