--- I saw Mr Li at the meeting yesterday.--- Did you? He have attended for he had asked

问题补充：

--- I saw Mr Li at the meeting yesterday.

--- Did you? He have attended, for he had asked for sick leave.

A. needn’t

B. couldn’t

C. shouldn’t

D. mustn’t

答案：

A. needn’t

(答案→)B. couldn’t

C. shouldn’t

D. mustn’t

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