—Where Margaret have put the empty bottles? —She them away. They must be somewhere.A. ca

问题补充：

—Where Margaret have put the empty bottles?

—She them away. They must be somewhere.

A. can; can’t have thrown

B. must; needn’t

C. must; must have thrown

D. can; must throw

答案：

(答案→)A. can; can’t have thrown

B. must; needn’t

C. must; must have thrown

D. can; must throw

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