Knowledge and learning are important if we want to be successful, but they may also __________ our thinking．

direct

limit

change

improve

The government has taken measures to __________ the high prices of daily goods to keep the market stable．

take down

tear down

hand down

bring down

Was it on a lonely island __________ he was saved one month after the boat went down?

where

that

which

what

You’ll find taxis waiting at the bus station __________ you can hire to reach your host family．

which

where

when

as

One third of the country __________ covered with trees and the majority of the citizens __________ black people．

is; are

is; is

are; are

are; is

Dr．Peter Spence, __________ headmaster of the school, told us, “__________ fifth of pupils here go on to study at Oxford and Cambridge．”

a; A

不填；The

the; The

不填；A

The Internet is a wonderful discovery, _________ of great significance to people’s lives．

as is I think

which I think it is

as I think

which I think is

The country life he was accustomed to _________ a lot since 1998．

change

has changed

changing

had changed

He worked hard before the college entrance examination, and it _________．His dream to go to college came true．

showed off

paid off

put off

took off

He was so careless that he left _________ the door _________．

leaving; unlocked

to leave; locked

left; unlocking

leaving; locking