29．—May I speak to your manager at three o’clock tomorrow afternoon ?—I’m sorry He to Sha

问题补充：

29．—May I speak to your manager at three o’clock tomorrow afternoon ?

—I’m sorry, He to Shanghai by then

A. had flown

B. could have flown

C. will have flown

D. has flown

答案：

A. had flown

B. could have flown

(答案→)C. will have flown

D. has flown

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