Question

Take exercise and pay attention to your diet if you want to

Answer 1

1.Mr.Smith needs more exercises to keep fit.

史密斯先生要健身还需要更多的锻炼.

2.Good habits can help you to keep fit.

良好的胜过习惯可以帮助你保持健康.

3.We must take good care of ourselves and keep fit.

我们必须好好照顾自己以保持身体健康.

of course D is the best answer.