______ all the required papers, he didn’t answer the questions fluently in class.
A．Having not readB．Not having readC．Not readD．Not to read
B
考查非謂語動詞做原因狀語用法。He與read構(gòu)成主動關(guān)系，根據(jù)句意可知是完成時且表示主動，所以使用現(xiàn)在分詞形式。非謂語動詞的否定式是在前面直接加not,所以選擇B。結(jié)合句意可知B正確。句意：因為沒有讀完所有要求的論文，他在課堂上不能流利地回答問題。
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