11.   The Chinese diet is considered to be the healthiest in the world.

12.   Some peoples consider that there is water around us, such as river water, rain water and water under earth.

13.   It is considered that fresh water is not used up for ever.

14.   People always consider that fresh water is enough to use for ever.

15.   Most people consider that Fresh water is so adequate that it may not be used over .

16.   Water is considered to be next to oxgen in importance.

17.   Generally speaking, the global shortage of fresh water must be considered vital to man's pursuit of happiness.

18.   So some people consider that fresh water is so much that it can be used forever.

19.   It is probably well considered that the fresh water is limitless.

20.   At past, people always consider that the fresh water is so much that we can use it forever.