that boy is busy (in)reading the book ,her mother is busy(with)her clothes.
be busy in doing sth 表示过去或现在着重干/忙于某事.
be busy with sth 表示现在忙于某事
that boy is busy ()reading the book ,her mother is busy()her clothes.
that boy is busy ()reading the book ,her mother is busy()her clothes.
英语人气:996 ℃时间:2019-09-22 06:08:59
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