People are puzzled they read the book. A. the first timeB. at the first timeC. for the fi

发布时间：2020-08-15 02:26:47

People are puzzled      they read the book.
A. the first time
B. at the first time
C. for the first time
D. at first

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(答案→)A. the first time
B. at the first time
C. for the first time
D. at first
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