---- You have given them some advice.---- So I did but who cared what I said?A. mustB. o

问题补充：

---- You have given them some advice.

---- So I did, but who cared what I said?

A. must

B. ought to

C. might

D. could

答案：

A. must

(答案→)B. ought to

C. might

D. could

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