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题目
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Something ___ to save our earth. Do you think so?
A.can doB.must doC.has to doD.must be done

答案
D
解析
something must be done意为:必须采取措施.
核心考点
试题【Something ___ to save our earth. Do you think so?A.can doB.must doC.has to doD.m】;主要考察你对虚拟语气等知识点的理解。[详细]
举一反三
I can’t find my English book. I must ___ it at home this morning.
A.forgetB.leaveC.have forgottenD.have left

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We ___ to the farm last week.
A.hadB.needed toC.didn’tD.had to go

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--Must we hand in our homework now?---No, you ___. You ___ hand them in before Friday.
A.mustn’t , canB.needn’t, canC.can"t , canD.mustn’t, must

题型:不详难度:| 查看答案
——What sort of house do you want to have?  Something big?
——Well, it          be big--that’s not important.
A.mustn’tB.needn’tC.can’tD.won’t

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She didn"t answer the phone.She ___ be asleep.
A.couldn"tB.mustn’tC.mightD.had to

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