28.－ you put away your books?－Yes mum. I’ll do it at once.A. MightB. ShouldC. CouldD. Mus

问题补充：

28.－ you put away your books?

－Yes, mum. I’ll do it at once.

A. Might

B. Should

C. Could

D. Must

答案：

A. Might

B. Should

(答案→)C. Could

D. Must

解析：could表示请求某人做某事，加强语气。

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