根据句意及汉语提示写出所缺单词。

1. Travelling in China is a great______(经历)for Tom.

2. You mustn't drive if you don't have a driver's______(执照).

3. Nobody can______(成功)without hard work. Do you agree?

4. The students will be ______(困倦的)if the class is boring.

5. John gets to know the ______(重要性)of learning English well.

患者，女，23岁，初潮晚，月经后期量少，渐至闭经，头晕耳鸣，腰酸腿软，舌淡红，苔少，脉沉细，首选方剂是（）

A．肾气丸

B．寿胎丸

C．调肝汤

D．归肾丸

E．当归地黄饮