The mountains form a natural between the two countries so they have no trade relations in history.
#6961
A
exchange
B
bridge
C
barrier
D
fence
推荐题目
The rising house price and the high income tax rate have become the biggest ______ of the ordinary people in China today．
#6241
A
concern
B
influence
C
involvement
D
occupation
While traveling, whether on business or for _____ , you often need to stay in a hotel.
#6565
A
pressure
B
pleasure
C
patience
D
purpose
I’m afraid none of us can __________ the machine that has been imported from abroad.Which of the following is wrong?
#6994
A
work
B
run
C
turn
D
operate