––Beijing is a big city, isn’t it?––Yes. In fact, it’s one of ____ cities in the world.
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A
big
B
bigger
C
biggest
D
the biggest
推荐题目
 I think Hangzhou is one of ________ in China
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A
more beautiful cities
B
most beautiful cities
C
the most beautiful cities
D
the more beautiful cities
The population problem may be ______ one of the world today.
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A
the most
B
most difficult
C
the greatest
D
more interesting
I had to call a taxi because the box was _______ than I’d expected.
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A
heavy
B
heavier
C
the heavier
D
the heaviest