用sort的相关短语完成句子。

1. She was tired and                             by the time she arrived home.

2. There are                             jobs you could do.

3. I have                   understood what you said.

4. Your room is in a mess. It needs                    .

方剂中，加强君药治疗主病或主证作用的药物属于：（）（1496-22）

A.臣药

B.佐药

C.君药

D.使药

E.引药