You go and ask Lily . She know the answer.A. must can B. must may C. need can D. can

问题补充：

You go and ask Lily . She know the answer.

A. must, can

B. must, may

C. need, can

D. can, may

答案：

A. must, can

B. must, may

C. need, can

(答案→)D. can, may

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