属于幻想故事的有（）。

A.《田螺姑娘》

B.《十兄弟对敌》

C.《傻子娶媳妇》

D.《狼外婆》

E.《长工约》

Tom was absent from school today. We guess he      .

A．must have overslept

B．could have been overslept

C．should have overslept

D．ought not to have overslept