They are going to see the movie Avatar(阿凡达). Why not ________ them?

A. to join                 B. join                  C. joining

大承气汤的组成原则，下述错误的是

A．大黄为君，泻热通便，荡涤胃肠积滞
B．芒硝为臣，软坚润燥，泄热通便
C．厚朴为佐，行气、消胀除满
D．枳实为佐，破气消积、除痞
E．甘草为使，调和诸药