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
Internet is an important _____ for people to get the latest news.
#5628
A
source
B
origin
C
resource
D
cause
It’s the ________ in Britain for a bride to throw her flowers to the wedding guests.
#5294
A
habit
B
rule
C
custom
D
law
The manager told me with great ______ that he couldn’t offer me the job.
#6168
A
regret
B
sadness
C
kindness
D
patience