They were surprised that a child should work out the problem they themselves couldn’t.A.

发布时间：2020-08-16 22:29:19

They were surprised that a child should work out the problem      they themselves couldn’t.
A. when
B. where
C. until
D. while

网友回答

A. when
B. where
C. until
(答案→)D. while
解析：考查连词辨析。while是个并列连词，表示“转折”，而其它连词均没有转折之意。句意：他们很惊讶一个孩子能够解决出这个问题，而他们不能够。
以上问题属网友观点，不代表本站立场，仅供参考！