He knows so much about Russia that he's universally acknowledged as a(n) _____ on Russian affairs.
#5544
A
authority
B
routine
C
privilege
D
boundary
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一 Why do you choose to work in an international travel agency?一 Well, you know, English is my . So it is my best choice.
#5916
A
strength
B
talent
C
ability
D
skill
We look forward to the day when the motorcar has been replaced by some less dangerous ____ of transport.
#7295
A
methods
B
means
C
manners
D
ways
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