__________ of his parents are doctors.
| A．Each | B．Both | C．All | D．Some |
—__________ she sing English songs?
—Yes, she can.
| A．Can | B．Must | C．Need | D．Should |
This box is __________ than that one.
| A．heavy | B．heavier |
| C．heaviest | D．the heaviest |
—__________ do you go to the cinema?
—Once a month.
| A．How long | B．How many |
| C．How much | D．How often |
Be quick, __________ you’ll be late for school.
| A．or | B．so | C．and | D．but |