1 . The young man, when questioned why he ________(break) the law, just looked at the policeman and said nothing. (所给词的适当形式填空）

2 . Running every morning is of great benefit ________ our health. (用适当的词填空)

3 . He was fifty-six. In two years he ________ (be) fifty-eight. （所给词的适当形式填空）

4 . I have been eager to do something ________ (benefit) to the world. (所给词的适当形式填空)

5 . Students before exams, ________(benefit) from years of drills, looked calmer than some of their teachers. (所给词的适当形式填空）

6 . Having ________ (balance) meals is very important, especially for teens who are growing up. (所给词的适当形式填空）

7 . She is struggling ______（bring）up a family on a very low income.(所给词的适当形式填空)

8 . She may prove _________ (be) the most suitable person for the job. (所给词的适当形式填空)

9 . We should have a ________ (balance) diet rich in fruit and vegetables. (所给词的适当形式填空）

10 . The passengers, rather than the driver _________ (blame) for the accident. (所给词的适当形式填空)