The doctor are busy ____ the dying man.a:save b:saved c:saving d:to save 我选的是d答案选a 为什么?

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The doctor are busy ____ the dying man.a:save b:saved c:saving d:to save 我选的是d答案选a 为什么?

The doctor are busy ____ the dying man.a:save b:saved c:saving d:to save 我选的是d答案选a 为什么?
The doctor are busy ____ the dying man.a:save b:saved c:saving d:to save 我选的是d答案选a 为什么?

The doctor are busy ____ the dying man.a:save b:saved c:saving d:to save 我选的是d答案选a 为什么?
应该选c
be busy doing sth.

be busy doing sth=be busy with sth