before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare要选哪个 为什么

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beforespringfestival,peoplearebusy()foritA.preparedB.preparingC.prepareD.toprepare要选哪个为什么beforesprin

before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare要选哪个 为什么
before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare
要选哪个 为什么

before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare要选哪个 为什么
选B.be busy doing固定搭配

选B
因为有一个结构 be busy (in) doing