—__________ do I have to change the robot’s batteries? —Every two months.
| A．How long | B．How soon | C．How often | D．How many |
Mr. Green likes __________ very much and he goes swimming every day.
A. collecting stamps B. sports C. music
_______ called you just now, but he didn’t tell me his name.
A. Somebody B. Anybody C. Nobody
---John, my computer doesn’t work. --- Why not ask Mr. Liu __________ it?
A. checking B. to check C. to buy
Mother doesn’t ______________ me watch TV on weekdays.
A. inviteB. keepC. let
The pandas were lovely and we couldn’t help ______________ them.
A. watchingB. to watch C. to look for