根据所给汉语及首字母提示填空

1. John is one of the most wonderful p_____(飞行员).

2. This old teacher has many good teaching s_____(经验).

3. F_____(消防员) are those men who can quickly put out fires.

4. Yang Liwei is an excellent a_____(宇航员).

5. The e_____(雇主) wants to find good employees.