My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared...My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared.答案选A为什么不可以是B,不定式做宾语补足语,对Busy解释说明?

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My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared...My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared.答案选A为什么不可以是B,不定式做宾语补足语,对Busy解释说明?
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My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared...My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared.答案选A为什么不可以是B,不定式做宾语补足语,对Busy解释说明?
My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared...
My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared.答案选A为什么不可以是B,不定式做宾语补足语,对Busy解释说明?

My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared...My brother is busy_for the exam.A preparing B to prepare C prepared Dwas prepared.答案选A为什么不可以是B,不定式做宾语补足语,对Busy解释说明?
没有be busy to do sth 的说法
这里be busy doing sth 是固定搭配.楼主一定要记住.这是特殊的
楼主有不明白的还可再问.祝学习更上一层楼

A
be busy doing sth 忙于做某事

这个题很简单啊，你不用考虑的那么复杂
这个题考查的是固定短语，be busy doing sth 忙于做某事
希望帮到你，祝学习进步

be busy doing sth 选A

您好：
A be busy doing sth. 忙于做某事，固定搭配。
busy 的意思：
.忙的, 专心的；繁忙的, 热闹的；(电话线)正在被占用。
一定要幸福哦！

my brother is [tall] My u_______ is my mother is brother. My brother is OK.=My brother is ___ ___. My father is your brother She is my brother , Nancy My brother is ( ) ( ) his clothes my brother is crazy( )football My brother is looking___his photos. what is my brother like? My brother is taking pictures That () Paul.()is my brother the baseball is ( )my brother A baseball is ( )my brother. my brother is wedding day This man is (my brother).对my brother部分提问 The boy is my brother.(就my brother 提问) The boy is my brother 对my brother提问 He is my brother.对my brother提问