schools in the U．S., so she made her way to France where she could learn flying"可知，Bessie Coleman到法国是想实现自己成为飞行员的梦想。

　　2．Who made a contribution to aviation education?

　　A．Bessie Coleman.　 　 　　 B．Bessica Raiche.

　　C．Willa Brown. D．Peggy Whitson.

　　解析：选C　细节理解题。由第三段的最后一句可知，Willa Brown创办了第一所政府支持的非裔美国人飞行训练学校。

　　3．What can we know about Peggy Whitson?

　　A．She enjoyed her journey in space.

　　B．She set some surprising records.

　　C．She devoted herself to building the ISS.

　　D．She set other black women an example.

　　解析：选B　推理判断题。由最后一段可知，宇航员Peggy Whitson创造了几项世界纪录。

　　4．Which of the following do the four share?

　　A．They are outstanding women pilots.

　　B．They suffered discrimination at work.

　　C．They never received good education.

　　D．They have shown great creativity.

　　解析：选A　推理判断题。由第一段的最后一句、第二段的"Raiche became the first American woman to make a flight in an aircraft by herself"以及第三段和第四段的内容可推知，这四位都是杰出的女飞行员。

　　B

　　Krubera Cave in the western Caucasus Mountains is the deepest known cave in the world. An international team prepared to descend into Krubera. The team members hoped to be the first cavers to reach a depth of 2,000 meters, brought five tons of equipment and other necessities with them, and established camps at key locations along the route. They worked for up to 20 hours each day.

　　In the third week, progress was blocked at 1,775 meters by a sump - a cave passage filled with water that gives cavers few options. There are basically three techniques available: dive through it, empty it, or go around it. Gennadiy Samokhin dove to the bottom but was disappointed. "No chance to get through，" he said. Searching for a way around the sump, Garcia Dils risked entering a waterfall of near freezing water and discovered that his dry suit had holes in it. "The water was so cold I lost the feeling in my fingers，" he said later. He, too, was unsuccessful.

Finally, two teammates found a way around the sump through a tight passage they called the Way to