—Please don't throw paper on the ground. —________，I won't.
| A．Excuse me | B．That's all right |
| C．Sorry | D．It doesn't matter |
Li Lei's parents ______ doctors.
| A．are all | B．are both | C．all are | D．both are |
Your bag is smaller than______.
| A．his | B．his's | C．him | D．their |
Who cleaned the classroom just now? Tom .
| A．cleaned | B．does | C．was | D．did |
Don’t read in bed ， it’s not ____ your eyes.
| A．good for | B．bad at | C．bad for | D．good at |
I think we’re old enough with housework.
| A．to help | B．helping | C．helped | D．help |