More and more people prefer to walk rather than ride in cars．
_____． Walking is good for health．（ ）
A．So they areB．So are they
C．So they doD．So do they
More and more people prefer to walk rather than ride in cars．
_____． Walking is good for health．（ ）
A．So they areB．So are they
C．So they doD．So do they
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