摘要： They were surprised that a child could work out the problem they themselves couldn’t. A. once B. while C. then D. if
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. They were surprised that a child could work out the problem ______ they themselves couldn’t.
A. once B. while C. then D. if
查看习题详情和答案>>They were surprised that a child could work out the problem____they themselves couldn't.
A.once B.while C.then D.if
查看习题详情和答案>>They were surprised that a child could work out the problem ______ they themselves couldn’t.
A. once B. while C. then D. If
查看习题详情和答案>>