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With his attention on his book, he didn’t notice me enter his study. A. focusing

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With his attention on his book, he didn’t notice me enter his study. A. focusing

 With his attention _____ on his book, he didn’tnotice me enter his study.

A. focusing       B.focused       C. tofocus      D. focus

 

试题答案

【答案】

B

【解析】

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