60. D 考查细节理解。根据Swim with Dolphins(海豚)?中的"when dolphins get too near to the boats loaded with tourists, they could get caught up in ropes and killed by propellers(螺旋桨)"可推知和海豚一起游泳对海豚是有危险的。故选D项。
61. B 考查细节理解。 根据Go to See the Mona Lisa?中的"it is hard for you to see the painting clearly... many tourists can remain in front of the painting only for 15 seconds at most"可知作者认为去看蒙娜丽莎的画像没有想象中那么令人满意。故选B项。
62. D 考查推理判断。根据文中的"Now you have a list to end all lists!" " Take a look at...from the list of..."可知作者想提供一个不同于其他清单的清单。故选D项。
63. A 考查作者意图。根据文章最后一段中的"read... Visit... buy the book..."可知此文是为一本书做广告的。故选A项。