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    I think father would like to know I’ve been up to so far.so I decide to send him a quick note. A.which B.why C.what D.how 答案 C 解析 此句关键在于弄清短语be up to该短语意思是:忙于.从事.其中to为介词.所以需要一个代词.根据句意.只能用what. 【查看更多】

     

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