By the time you get to Shanghai tomorrow I for Chongqing.A. would have leftB. have leftC.

问题补充：

By the time you get to Shanghai tomorrow, I for Chongqing.

A. would have left

B. have left

C. shall have leaving

D. will have left

答案：

A. would have left

B. have left

C. shall have leaving

(答案→)D. will have left

解析：By the time后跟一般现在时态时，主句用将来完成时态，故选D。句意：到你明天到达上海的时候，我将动身去重庆。