in charge of two classes made Mrs．Li, head of Senior Grade 3, extremely tired．A．LeavingB．LeftC．Bein

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【题目】_____ in charge of two classes made Mrs．Li, head of Senior Grade 3, extremely tired．

A．Leaving

B．Left

C．Being left

D．Having left

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【答案】C

【解析】left是过去分词，being left 则是动名词。本句谓语是made，但是缺了主语，所以选择being left，动名词可以作主语，过去分词则不行。