摘要：25．The air in Beijing is getting much now than a few years ago． A．clean B．cleaner C．cleanest D．the cleanest
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The air in Beijing is getting much ________ now than a few years ago．
[ ]
A．clean
B．cleaner
C．cleanest
D．the cleanest
The air in Beijing is getting much ________ now than a few years ago．
[ ]
A．
clean
B．
cleaner
C．
cleanest
D．
the cleanest
The air in Beijing is getting much ________ now than a few years ago．
[ ]
A．
clean
B．
cleaner
C．
cleanest
D．
the cleanest
The air in Beijing is getting much ______ now than a few years ago.
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| A．clean | B．cleaner | C．cleanest | D．the cleanest |