Bicycling is good exercise, , it does not pollute the air. [ ]A. nevertheless B.
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![Bicycling is good exercise, , it does not pollute the air. [ ]A. nevertheless B.](/pic/43_1443224.jpg)
Bicycling is good exercise, ________, it does not pollute the air. [ ]A. nevertheless
B. besides
C. otherwise
D. therefore
试题答案
B