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er
A
fresh
ier
+er
变y为i+er
than that in A.
that in B.
than
The sky in A is ____________
The sky in B is ________.
than that in B.
dark
B
blue
sky
dark
r
A
blue
er
+r
+er
than that in A
It’s ____________in the countryside.
It’s ______. in the city.
noisy
B
quiet
noisy