用动词不定式短语,分词短语和动名词短语替换下列各句中的从句部分 1.The students suggested that they should go there on foot 2.The question was so difficult that I could not answer it 3.I can't remember I have heard the news
问题描述：
用动词不定式短语,分词短语和动名词短语替换下列各句中的从句部分 1.The students suggested that they should go there on foot 2.The question was so difficult that I could not answer it 3.I can't remember I have heard the news
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