项和D项错误；文章虽然提到了自行车的颜色多种多样，但这并不是它受欢迎的原因，故C项错误，故选B。

【2题详解】

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。作者在有了骑行经历之后才发现了其中的乐趣，故A项错误；文章并未提到作者购买自行车是为了作为交通工具或者提高骑行技术，故排除B项和D项，故选C。

【3题详解】

B细节理解题。细节理解题。根据倒数第二段的叙述Crossing the streets was the biggest problem.so crossing took time, skill and a little bit of luck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。其余选项均与本段内容不符，故选B。

【4题详解】

D细节理解题。由最后一段The feeling on the bicycle was amazing. The air was hitting my face and going through my hair. I was sitting on top of the world as I passed by places and people. 可知，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D项正确。A项意为"作者喜欢炫耀自己的骑行技术"；B项意为"作者很讨厌骑行时的空气"；C项意为"作者被其他骑行人员赞扬了"，均与文章内容不符，故选D。

考点：考查故事类短文阅读

Summer Courses 2009

　　San Diego Seaside College is offering one and two-weelc English summer courses for high school students from all over the world who want to improve their English. Classes are offered at five levels, from basic to advanced. Students will be tested when they arrive and placed in the level appropriate to their language ability. Each class has a maximum of 14 students.

Tuition Fees(学费)

　　One-week Course (July 26-August 1) : $310

Two-week Course (July 26-August 8 ) : $ 620