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.