She was busy _____ after her mother.(look)

问题描述:

She was busy _____ after her mother.(look)

looking

looking
be busy doing sth.

looking
be busy doing sth.是短语.
译为:她忙着照看她的母亲.

looking
固定搭配
be busy doing sth

looking
固定搭配:be busy doing sth.忙于做某事