5.
After the mine accident, the government sent group of experts to_________the matter.
A．look into
B．look down upon
C．look through
D．look forward to
6.
After the mine accident, the government sent group of experts to_________the matter.
A．look into
B．look down upon
C．look through
D．look forward to
7.
Had he worked harder, he _________ the exams.
A．must have got through
B．would have got through
B．should get through
D．could get through
8. When he arrived at the airport ,Mr. Smith found that he_________his ticket in the office.
A．has left
B．was leaving
C．had left
D．would leave
9.
Nuclear science should be developed to benefit people _________ harm them.
A．more than
B．better than
C．other than
D．rather than
10.
You never told us why you were absent from the party ,_________?
A．weren’t you
B．didn’t you
C．did you
D．were you
11.
— Could you give me some ink?
—Sorry, I haven’t_________ left myself.
A．many
B．much
C．few
D．little
12.
The film_________three hours. It is the longest one I have ever seen.
A．lasted
B．stayed
C．finished
D．ended
13.
We should be grateful if you would reply at your_________ convenience.
A．lasted
B．earliest
C．earlier
D．the earliest
14.
Nowhere else in the world _________ more beautiful scenery than in Switzerland.
A．you can see
B．you had seen
C．can you see
D．had you seen
15.
The little boy won’t go to sleep _________ his mother tells him a story.
A．since
B．when
C．lest
D．unless