问题补充:
In South Korea, most students get to school .
A. take a subway
B. in the subways
C. by the subway
D. by subways
答案:
A. take a subway
(答案→)B. in the subways
C. by the subway
D. by subways
解析:句意:在南韩,大多数的学生乘地铁上学。乘地铁用by subway或是take the subway,in the subways,故选B