We should go to school by bus or underground rather than by car global warming.
A. reducing
B. to reduce
C. reduced
D. having reduced
网友回答
A. reducing
(答案→)B. to reduce
C. reduced
D. having reduced
解析：考查非谓语动词。用不定式在句中作目的状语。句意：为了减少全球变暖，我们应该乘公交车或地铁去上学，而不是乘汽车。