-I wonder Mary has made rapid progress in such a short time.-By working extremely hard every day.A.

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编辑：chaxungu时间：2026-04-27 03:09:33分类：高中英语题库

【题目】—I wonder ________ Mary has made rapid progress in such a short time.

—By working extremely hard every day.

A. where B. how

C. why D. if

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【答案】B

【解析】

考查宾语从句。句意：—我不知道玛丽怎么在这么短的时间内取得了这么大的进步。—通过每天非常努力的工作。结合句意可知此处是how引导的宾语从句，故选B。