---A:ChristmasDayiscoming.---B:Everybodyhereisbusy______Christmascards.A.b

发布时间:2020-08-06 18:29:00

---A:Christmas Day is ing.---B:Everybody here is busy ______ Christmas cards.A.buyB.to buyC.buyingD.buys

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C解析(be busy doing:忙于做某事.)
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