阅读理解。根据短文内容，判断句子正 (T)误(F)。

      Tom often plays ball games in the school playground. He likes playing basketball and football. Sometimes he

goes to parties, too.

      Today is Sunday. The students from Tom's class are having a birthday party for Helen. There are many

boys and girls in Building E. They are singing and dancing. They are having a wonderful time. 

      Their teacher often says, "My students study at school almost every day. But at weekends, they play with

their friends."

( ) 1. Tom often plays football at school.

(     ) 2. He often goes to the park.

( ) 3. Tom's class are having a birthday party for Tom on Saturday.

( ) 4. They are having a wonderful time at Helen's birthday party.

(     ) 5. Their teacher knows them well.

保险利益的确定条件不包括：（）

A.合法的利益

B.确定的利益

C.经济利益

D.指定的利益