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.
