By the end of 的用法?
问题描述：
By the end of 的用法?
By the end of next month,they.bhe financial report.
A,could have completed B,have completed C,will have completed D,will complete
应该选C还是D
我明白By the end of +将来时间,主句用将来时,这个怎么不适用呢?
答
选C
by+时间点→完成时态
由于是将来的时间,所以是将来完成时：will have done可否分别说明一下By the end of +不同时间，主句应该用的时态？