The university estimates that living expenses for international students ______ around $8,450 a year, which ____ a burden for some of them.
A are；are B. is；are C. is；is D. are；is
There were a lot of people standing at the door and the small girl couldn’t get _______.
| A．between | B．through | C．across | D．beyond |
The kind-hearted couple decided to adopt the boy ____ parents had been killed in an accident.
| A．of whom | B．with whom | C．on whom | D．in whose |
As a lover of popular music, she enjoys listening to it _____ MP3.
| A． in | B．on | C．with | D．by |
Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
| A．with | B．between | C．to | D．for |
Though _____ my opinion, my mother didn’t say anything to show that she agreed with me.
| A．against | B．on | C．for | D．in |