1．(导学号：36422305)Tommy， B play basketball in the street next time.You may get hit by a car.(2016，广东)
A．do B．don't C．must D．mustn't
2． A to smile at your life when you are in trouble，and you will soon be happy again.(2016，黄石)
A．Try B．To try C．Trying D．Tried
3．—Don't throw paper on the floor.
— B (2016，临夏州)
A．Good idea. B．Sorry，I won't.
C．Cheers! D．No way!
