He did not regret saying what he did but felt that he _____ it differently. [ ]

A. could express

B. would express

C. could have expressed

D. must have expressed

下列杏苏散中含有的药物是（）。

A.半夏、桑叶

B.苏叶、生姜

C.茯苓、沙参

D.人参、前胡

E.麦冬、枳壳