根据句意及首字母提示补全所缺单词。
1. —Are you going to come? —P_______. I'll see how I feel.
2. Don't spit in p________. It's impolite and isn't good for the environment.
3. Tom had a bad cold and he c________ a lot.
4. "Please be quiet. The baby is sleeping," she said in a low v________.
5. As a student, we should obey the rules and can't b________ the rules.