翻译下列句子。

1. You must _____ to eat less junk food.

    你必须试着少吃垃圾食品。

2. A lot of vegetables _____ you keep in good health.

    吃大量蔬菜有助于保持健康。

3. She usually _____ three _____ a week.

    她通常每周锻炼三次。

4. Does she _____ a healthy _____?

    她有健康的生活方式吗?