A study shows that students living in non-smoking dormitories are not likely to the habit of smoking.
| A．pick up | B．turn up | C．draw up | D．make up |
Along with the email was my brother’s promise ______ I came first in the competition, he would buy me an MP4.
| A．what | B．that | C．that if | D．whether |
"We can’t go out in this weather," said Bob, ________ out of the window.
| A．looking | B．to look | C．looked | D．having looked |
Scientists are convinced _______the positive effect of laughter ______ physical and mental health.
| A．of ; at | B．by ; in | C．of ; on | D．on ; at |
Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.
| A．as if | B．now that | C．even though | D．so that |
It is so difficult a question_______ none of the kids could work it out.
| A．as | B．that | C．which | D．X |