题目内容
------- Now you can see how serious the situation is !
-------- Yes. We _____something before it got so bad .
A. should do B. must do C .must have done D. ought to have done
D
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题目内容
------- Now you can see how serious the situation is !
-------- Yes. We _____something before it got so bad .
A. should do B. must do C .must have done D. ought to have done
D