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We the letter yesterday, but it didn t arrive.A.must receiveB.ought to receiveC.

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We the letter yesterday, but it didn t arrive.A.must receiveB.ought to receiveC.

We _______the letter yesterday, but it didn”t arrive.

A.must receive

B.ought to receive

C.must have received

D.ought to have received

试题答案

D

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