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ThisJanuarywillbeverypreciousforusbywhichtimewe▁▁▁reviewingBook1.A.willfinishB.willhavefinishedC.havefinishedD.willbefinished为什么?是考哪一类用法?

题目详情
This January will be very precious for us by which time we ▁▁▁ reviewing Book 1.
A.will finish B.will have finished C.have finished D.will be finished
为什么?是考哪一类用法?
▼优质解答
答案和解析
1 考英语的时态.by + 表将来时间的短语(比如说by next May ,by the end of this January ,by the end of this month)时,句子谓语动词(表动作)的时态是将来完成时.
2 貌似你的句子本身就有错误.你说 this January 的时候,你在哪个月份(in what month do you say THIS JANUARY)啊---------你说这句话的时候是几月份啊?
3 你的题目哪里来的?