问题
选择题
------- 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
答案
答案：D
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------- 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
答案：D