1 . Reaching the top of the tower, he was out of ________ (上气不接下气) （根据汉语提示单词拼写）

2 . Everyone should hold the belief that a balanced diet is definitely b________ (有益处) to health. （根据中英文提示填空）

3 . Study hard, or you will be b__________（肯定）to fail the examination.

4 . The local people will b_______________(受益) from the project. （根据首字母和汉语提示写出单词）