根据句意和首字母完成单词。
1. John always s______ part of his pay each month. He wants to buy a cell phone with the money.
2. Maria is going to travel s______ interesting with her friends next time.
3. I hear the workers are b______ a subway in the city.
4. Paul wants to be an e______. He studies math very hard.
5. All the students of Class 2 made their New Year's r______ at the beginning of this term.