.He must be helping the old man to water the flowers, _____?
| A．is he | B．is’t he | C．must he | D．mustn’t he |
You will have to stay at home all day ______ you finish all your homework.
| A．if | B．unless | C．whether | D．because |
He works very hard in order to get himself ______ into a key university.
| A．accepted | B．received | C．announced | D．admitted |
--- Could we accomplish the task according to the schedule?
--- I doubt that. The problem remains ______ we can get financial aid within this week.
| A．that | B．how | C．why | D．when |
If you want to see Mr. Johnson on Friday morning, make sure he is ______ ahead of time.
| A．approachable | B．accessible | C．available | D．convenient |
I appreciate ______ the opportunity to work in your company two years ago.
| A．giving | B．to give | C．being given | D．to be given |