— I'd love to go to the party with you tonight.

— Oh, I'm sorry, there         be a party because of the coming exam. [ ]

A. mustn't

B. needn't

C. can't

D. oughtn't

（）是指两个以上得游戏者在一起按照预先规定得规则进行得具有竞争性得游戏，如下棋、跳房子等。