[解析]
(1)D.细节理解题。根据第三段中的They are to be found in numbers in the warmer oceans and they prefer the deep waters of open oceans.(它们在温暖的海洋中数量众多,它们更喜欢开阔海洋的深水。)可知,鲸鲨生活在温暖海洋的深水中,故选D。
(2)A.细节理解题。根据第五段中的How easy it must be for the fishermen to catch those beautiful creatures who can only swim at 3.5 miles per hour!(对于渔民来说,捕捉这些每小时只能游3.5英里的美丽生物是多么容易啊!)可知,鲸鲨容易被渔民抓住,是因为它们在海洋中以很慢的速度游动,故选A。
(3)C.细节理解题。根据倒数第二段The Philippines,India and Taiwan have all banned the fishing,selling,importing and exporting of whale sharks for commercial purposes.However,the law doesn't seem to be effective because the hunting and killing still goes on today,especially in Taiwan and the Philippines.(菲律宾、印度和台湾都禁止以商业目的捕捞、销售、进出口鲸鲨,然而,这项法律似乎并没有起到什么作用,因为捕杀鲸鲨的行为至今仍在继续,尤其是在台湾和菲律宾。)可知在台湾和菲律宾渔民们依然在继续捕杀鲸鲨,故选C。
(4)D.推理判断题。根据倒数第二段中的Each whale shark can fetch around $21,000.In parts of Asia they are known as the "money shark".(每条鲸鲨可以卖到21000美元。在亚洲部分地区,它们被称为"金钱鲨鱼"。)可知,每条鲸鲨可以卖到21000美元。在亚洲部分地区,鲸鲨被称为"金钱鲨鱼",所以这导致鲸鲨被人类捕杀,由此可知,文章暗示了巨额利润是鲸鲨数量减少的罪魁祸首,故选D。