短文填词。

     I have four good (1)f           . They're Jennifer, Victor, Cindy and Leila. We are in the (2)s          

 (相同的) class. So we're (3)c            (同班同学), too. Jennifer swims very well, she wants to join

the (4)s            club. Then she can swim on (5)S            or Sundays. Victor wants to join the art club

because he is good at (6)p           . Cindy is a pop music fan. She can sing a lot of (7)s           . So she

wants to join the (8)s            club. Leila wants to join the music club because she (9)p            the violin

very well. And she wants to be a (10)m            when she grows up (长大). I like them.

根据《合同法》的规定，()的不一定是无效合同。

A．当事人意思表示不真实

B．损害社会公共利益

C．以合法形式掩盖非法目的

D．当事人以欺诈手段签订的合同，并损害了国家利益