If you had seen Mr. Chang at the meeting you what to do now.A. would have knownB. would

问题补充：

If you had seen Mr. Chang at the meeting, you what to do now.

A. would have known

B. would know

C. will know

D. will have known

答案：

A. would have known

(答案→)B. would know

C. will know

D. will have known

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