be busy doing sth等于什么这句话The CEO is busy signing files.等于什么
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be busy doing sth 例句
be busy in doing sth
be busy with sth 与be busy doing sth
be busy doing sth等于什么这句话The CEO is busy signing files.等于什么
英语 翻译 be busy doing sth
有没有be busy with doing sth?
用be busy doing sth.句型造句
BE BUSY DOING STH 是主系表结构吗
be busy doing等于什么
be busy doing sth 与be busily doing的区别
be busy doing sth/with sthbe busy doing sth 后跟动词be busy with sth 后跟名词麻烦谁能造个句子
be busy doing sth和be busy with sth这两个句式的意思和用法
he is always busy___ (work)是用be busy doing sth还是 be busy with sth
是be busy doing sth还是be busy to do sth?
be busy with sth 与be busy doing sth的区别
be busy doing sth 和be busy to do sth 的区别
be busy with sth.be busy doing sth.这两句怎么解释?两句意思是否一样?
be busy doing sth和be busy with sth这两个句式的意思和用法,