单选题
As he delayed his departure on account of something important, by the time he arrives in Beijing, we ______ here for two days.
A、
have been staying
B、
have stayed
C、
shall stay
D、
will have stayed
【正确答案】
D
【答案解析】
[解析] 当时间状语by+将来时间点时，主句时态用将来完成时。
提交答案
关闭