They were surprised that a child should work out the problem ________ they themselves couldn't.A.once B.then C.while D.if
问题描述:
They were surprised that a child should work out the problem ________ they themselves couldn't.
A.once B.then C.while D.if
答
答案C 【巧解导析】此题是由两个分句组成的并列句.根据句意,分句之间表转折关系,四个选项中只有while是并列连词,含义为“而,却”. 查看原帖>>