1.  After a while, I had an idea.

2.  Do you have any idea that can improve them?

3.  I think , What can I to write, then , I had an idea.

4.  Because they sometimes have different ideas .

5.  English is a new kind of language to us, we haven't any idea about it before, so it's difficult for us to learn it .

6.  When they are using water, they never have the idea that they should be care of the "inexhaustable " blood of nature.

7.  First but most important, it is necessary for us to control the area of being polluted present and protect the clean area from being destroyed, next, people should have a idea of use water economically .

8.  Many people have the idea that fresh water will never be used out .

9.  And the social service by telephone or other ways also makes us have some idea of the society.

10.  We can almost stay that different people have defferent ideas of happiness.