Going to work by train is more fun than____ A.take a bus B.by bus C.taking a bus D.by a bus

题目

Going to work by train is more fun than____ A.take a bus B.by bus C.taking a bus D.by a bus
我知道这个题答案选C,但为什么不能选B 哪

答案

如果要用by bus,需要前面加that,that指代going to work,而这个题里没有that,所有要对应前面就必须用taking a bus,来对应going to work