1. No matter what he says , nobody believes him.

2. Drinking more water is good for our health.

3．刘翔是我国最优秀的运动员之一。

Liu Xiang is  ___________________  in our country.

4.他们每天花费半小时进行体育锻炼。

__________________________________to do sports every day.

5．建立和谐社会，人人有责。

It's everyone's              to                a society in perfect harmony (和谐).