. By the time you arrive in London wein Europe for two weeks.A. shall stayB. have stayedC

问题补充：

. By the time you arrive in London, wein Europe for two weeks.

A. shall stay

B. have stayed

C. will have stayed

D. have been staying

答案：

A. shall stay

B. have stayed

C. will have stayed

(答案→)D. have been staying

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