31.  as the factory is a new one, must of the workers are young people.

32.  For example, in our English studing , if we keep practising spoken-English usually and carefully, you will find that your ability of spoken-English is being improved gradurally .

33.  I think I will know a lot of .

34.  The methods of know the World Outside the campus can be through watching TV, or from the newspaper.

35.  As long as all of us do our bits in protecting the resource of water .

36.  Because there are many sources of water, such as the rain, river , the water of underground..

37.  On the other hand, we should try our best to improve the method of converting sea water into fresh water, so that the sea water can be made good use of.

38.  With the inclease of the amount of water the industry needs, and the worse move of pollution, fresh water resources are urgently in short of.

39.  In fact, the fresh water is very short of.

40.  But facing the problem of water shortage .