善于疏肝解郁的药物是（）

A.枳实

B.香附

C.青皮

D.香橼

E.佛手

-I have tried very hard to work out the problem, but failed.

- Why not turn to our monitor for help? You see, _______.

A．it never rains but pours

B．it's better to think twice before doing something

C．two heads are better than one

D．a bird in the hand is worth two in the bush