【题目】—Nowadays a growing number of people go to work by bike.
—Bicycling is good exercise；________it doesn't pollute the air.
A. therefore B. moreover
C. however D. otherwise
在线课程【答案】B
【解析】考查副词辨析。句意：——现在，越来越多的人骑自行车上班。——骑自行车是很好的运动，而且不污染空气。moreover此外，而且；therefore因此；however然而；otherwise否则。故选B。