2. 外语
  3. Professor Bill had begun taking ______ research work when he was in high school.

Professor Bill had begun taking ______ research work when he was in high school.

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问题 Professor Bill had begun taking ______ research work when he was in high school.
选项 A、to do
B、doing
C、to doing
D、having done
答案C
解析 Bill 教授在上中学的时候就喜欢做研究工作。短语take to 为固定搭配，意为“喜欢”；to 作介词，通常与名词或动名词搭配。
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大学英语四级

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