根据首字母或所给中文提示，写出正确的单词完成句子。

1. With exams only a week away, I am under a lot of s________.

2. Young people should be physical and ________(精神)health.

3. The forms of poems I liked best conveyed their meaning by using the b________ minimum of words.

4. Our aim is to further s________ the friendship between the two countries.

5. If he had ________ smoking, he would not have got the cancer at his early age.

硝酸酯类、β受体阻断药、钙通道阻滞药治疗心绞痛的共同作用是（）

A.调血脂

B.扩张冠状动脉

C.减慢心率

D.缩小心室容积

E.降低心肌耗氧量