1.  They spend a lot of fresh water including population increasing , polution , industry increasing etc .

2.  But, that isn't useful because of it's high mineral content, so we have to spend a lot of money to make it be useful.

3.  If we spend a lot of time on it , we will not probrobly concentrate on our study.

4.  However, too many activities, on the other hand, will come a lot of problems, If you spend a lot of time and delay your study or other important things, good things can also become bad things.

5.  We cost much for buying cards and spend lots of time on going to post offices to send cards.

6.  Many people spend a lot of money on smoking.

7.  On the other hand, if you have a very bad health, you must spend a lot of time in the bed, How can you study well?

8.  We must spend a lot of time to do it best.

9.  They must look for new job and spend a lot of times to learn it if they want change their job.

10.  And we spend a lot of time on doing those things.