阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用

括号中词语的正确形式填空。

     Were you the first or the last child in your family? Or were you a middle or an only child? Some people

think 1._____ matters where you were born in your family. But there are different ideas about what birth

order means. Some people say that oldest children, 2._____ are smart and strong-willed, are very likely

 3._____ (succeed). The reason 4._____ this is simple. Parents have a lot of time for their first child and

give him or her a lot of attention. An only child will succeed for 5._____ same reason. What happens to the

6._____ children in the family? Middle children don't get so much attention, so they don't feel that important.

If a family has many children, the middle one sometimes gets lost in the crowd. The youngest child, 7._____,

often gets special treatment. Often this child grows up to be funny. But a recent study saw things quite 

8._____ (difference). The study found that first children believed in family rules. They didn't take many

chances in 9._____ lives. They usually 10._____ (follow) orders. Rules didn't mean as much to later children

in the family. They took chances and they often did better in life.