[解析]
(1)A.细节理解题.根据第一段中的For many,it's the easiest and cheapest way to travel today.可知,自行车如今仍然很受欢迎,是因为它的便捷和经济.故选A.
(2)C.细节理解题.根据第三段第一句话Eager to be part of this aspect of Chinese culture…可知,作者购买自行车是因为迫切地想融入中国的这种文化之中,故C项正确.
(3)B.细节理解题.根据倒数第二段Crossing the streets was the biggest problem,可知,骑车过街是最大的问题,需要时间、技巧和运气,因此作者认为骑车过街非常困难.故选B.
(4)C.推理判断题.由最后一段 The air hitting my face and going through my hair was wonderful.I was sitting on top of the world as I passed by places and people.Biking made me feel alive.空气吹拂脸颊和头发的感觉很美妙,骑行时就像坐在了世界的顶端,骑自行车使作者觉得充满了活力.由此可判断出,作者觉得骑自行车很有乐趣,故C项正确.