I．单项选择：（共15小题,每小题1分,满分15分）
1．— Why did you laugh just now？
— Ted wanted to tell us ______ very funny story, but he forgot ______ ending himself.
A．a; an B．the; the
C．the; a D．a; the
2．— Why don’t you watch TV at home？
— I’d love to, but my mother doesn’t allow me _______ that.
A．do B．did
C．to do D．doing
