Recently, I ___ my first horse ride in Lijiang, Yunnan Province  __ I paid a visit to many local attractions

A．have had ; before

B．had ;when

C．had had; in which

D．was having; which

某男，44岁。喘咳气涌，胸部胀痛，痰多色黄质稠，胸中烦热，有汗，面红尿赤，苔黄脉滑数。选方用（）

A.麻杏石甘汤

B.定喘汤

C.麻杏蒌石汤

D.桑白皮汤

E.小青龙汤