Which one is ________,the white one or the black one?
#61042
A
good
B
better
C
best
D
well
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If there are     trees, the air in our city will be      cleaner.
#61085
A
less; more
B
more; more
C
more; much
D
much; more
The Changjiang River is one of ________ in the world.
#61144
A
the longest river
B
the longest rivers
C
the longer river
D
longest river