To his surprise,a child should work out the problem__ he himself couldn't.

分类: 作业答案 • 2022-01-26 17:17:02

问题描述：

To his surprise,a child should work out the problem__ he himself couldn't.
A.if B.then C.when D,while 为什么

答

D
while有转折的语气,然而的意思