—Dad, why should I stop ______ computer games?
—For your health, my boy.
| A．to play | B．playing |
| C．play | D．to playing |
Simon listens to the teacher as ________ as Tony.
A. careful
B. carefully
C. more carefully
---________ is the population of your city?
--- About seven ________.
A. What; millions
B. How many; millions
C. What; million
Class, listen up! I have ________ to tell you. Please come here.
A. anything good
B. good something
C. something good
If you are in trouble, why________ ask the police for help?
A. not to B. don’t you C. not you
Please try________ late again next time. You should be on time.
A. not to be B. not be C. to be