◎ 题干

------- 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
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“------- Now you can see how serious the situation is !-------- Yes. We _____something before it got so bad . A.should doB.must doC.must have doneD.ought to hav…”主要考查了你对  【虚拟语气】【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。