—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 |
—Don't forget ________your homework，John.
—OK.I'll do right now.
A．doing B．do C．to do