--Why has he been staying at home these days?  

--He ___________ since a month ago.

A．has been out of work

B．was out of work

C．has lost his work

D．had left from his work

既能清热利湿，又能凉血解毒的药物是（）

A.栀子

B.芦根

C.淡竹叶

D.天花粉

E.知母