She __________ know the answer, but I'm not sure.
A. can B. may C. must
I’m not full. Could I have ____________ cake?
| A．other | B．the other |
| C．another | D．the another |
–__________do you exercise? – I exercise three times a week.
| A．How often | B．How many days |
| C．How usually | D．How much |
_______the party, we sang a song together.
| A．In the end | B．At the end |
| C．In the end of | D．At the end of |
The students want to ask for ____________off.
| A．ten day’s | B．ten days |
| C．ten-days’ | D．ten days’ |
– Can you come to my birthday party?– I’m sorry, ___ I can’t come.
| A．and | B．but | C．or | D．then |