She knows a lot about the film. She must have seen it before, ______ ?

must she            B. mustn’t she     C. has she      D. hasn’t she

有宣肺解表，祛痰平喘之功的方剂是

A．定喘汤

B．小青龙汤

C．麻杏石甘汤

D．贝母瓜蒌散