问题详情:
-Could you tell me ?
-Sorry, I'm not sure.
A. when can we take the Zhengzhou-to-Jiaozuo railway
B. when we can take the Zhengzhou-to-Jiaozuo railway
C. when could we take the Zhengzhou-to-Jiaozuo railway
D. when we could take the Zhengzhou-to-Jiaozuo railway
【回答】
B
知识点:宾语从句
题型:完成句子