— Will you please stay here for the party?

— Sorry, I _____. I'll have to go to an important meeting. [ ]

A. mustn't

B. needn't

C. can't

D. won't

2008北京奥运会的“三大理念”是（）。

A．绿色奥运、科技奥运、人文奥运

B．绿色奥运、和谐奥运、人文奥运

C．中国风格、人文风采、时代风貌

D．中国风格、时代风貌、大众参与