You had better ask your brother _______ playing computer games. It’s bad for him.
| A．to give up | B．not to give up |
| C．to give it up | D．not give it up |
Whenever you have a chance ________English，you should take it.
| A．speak | B．to speak |
| C．spoke | D．speaks |
—I often have hamburgers for lunch.
—You'd better not. It's bad for you ________too much junk food.
| A．eat | B．to eat | C．eating | D．ate |
The new treatments ________by Norman Bethune helped a number of soldiers.
| A．invent | B．invents |
| C．inventing | D．invented |
If prices rise too high, the government has to do something ________it.
| A．stop | B．stopped |
| C．stopping | D．to stop |
At last the boy was made ________and began to laugh.
| A．stop crying | B．to stop to cry |
| C．to stop crying | D．stop to cry |