_____ 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

C

【解析】left是過去分詞，being left 則是動名詞。本句謂語是made，但是缺了主語，所以選擇being left，動名詞可以作主語，過去分詞則不行。

考點：考查非謂語動詞。

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