Don't keep your mouth ___ if you want to improve your spoken English.

A．shut

B．shutting

C．shutted

D．to shut

二仙汤合二至丸用于治疗哪种证型的绝经前后诸证：

A．肾阴虚

B．肾阴阳俱虚

C．肾阳虚

D．心肾不交

E．阴虚肝旺