George is very healthy. He _______ goes to the doctor.
| A．always | B．seldom |
| C．often | D．usually |
Mr. Johnson has given up ________.
| A．smoke | B．smoked | C．to smoke | D．smoking |
I think _________ history about China is very important.
| A．study | B．studying | C．studied | D．studies |
Teenagers should be allowed______ their own clothes.
| A．to choose | B．choose | C．chose | D．choosing |
Mary used to _____short hair.
| A．be | B．have | C．had | D．has |
Most Chinese children like to sleep with their parents.
They are ____ the dark.
| A．afraid | B．afraid of | C．afraid to | D．afraid in |