By the time we got there,the meeting _____.A.was beginning B.had _英语解答

By the time we got there,the meeting _____.
A.was beginning B.had began
C.had already begun D.begun

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解答

C
by the time是明显的完成时的标志,从句中用的是got过去时,因此主句应该用过去完成时.只能在BC中选,但Bhad后的begin应该用过去分词形式,所以选C