before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare
题目
before spring festival,people are busy ( )for it A.prepared B.preparing C.prepare D.to prepare
要选哪个 为什么
答案
选B.be busy doing固定搭配
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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