school will break up on july 1 ,______which time we will have got our school report.

问题描述:

school will break up on july 1 ,______which time we will have got our school report.
A.by B.during C.at D./
我选C的 为什么答案是A?

因为后半句话的意思是,截至什么时候我们能拿到我们的报告?“截至某某时间”在英语里用的是by.