根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
小题1: When a person does a certain thing over and over again, he is impelled by some unseen force to do the same thing repeatedly; thus a habit is formed. Once a habit is formed, it is difficult, and sometimes impossible, to get rid of. 小题2:
Children often form bad habits, some of which remain with them as long as they live. Older persons also form bad habits as long as they live, and sometimes become ruined by them.
小题3: Many successful men say that much of their success has something to do with certain habits formed in early life, such as early rising, honesty and thoroughness.
The habits which children should not form are laziness, lying, stealing and so on. 小题4: Unfortunately older persons often form habits which ought to have been avoided.
We ought to keep from all these bad habits. 小题5:
A．These are all easily-formed habits.
B．Habits, whether good or bad, are gradually formed.
C．Whether habits are good or bad, they are easy to get rid of.
D．It is very important for us to know why we should form good habits.E. There are other habits which, when formed in early life, are of great help.
F. Meanwhile, try to form habits that are good for yourselves and others.
G. Therefore, it’s very important for us to pay attention to the formation of habits.