【正确答案】 A

【答案解析】[听力原文]
   The Gobi Desert in Asia is one of the largest desert areas in the world. It stretches across most of Mongolia and the north of China. It is shut in by mountains to the north, south and west. In summer, it is very hot during the day, but at night the temperature falls steeply. In winter, it is very cold and there are snowstorms.
   There is very little water in the Gobi Desert. It rains very little and there are just a few streams and no big rivers at all. Most of the area is bare rock. In summer, a little coarse grass and some thorny bushes grow there. In some places, there is just enough grass to feed a few sheep, horses and camels.
   About 1,300 years ago, a young Chinese traveler set out to cross the desert. His name was Hsuan-Tsang and he was just 19 years old. His friends and the guide all turned back. They did not want to risk crossing the desert. So Hsuan-Tsang went on alone. He rode a horse which had crossed the desert many times before.
   Hsuan-Tsang tried to follow the tracks of camels and other animals. He was in danger of losing his way. Several times he nearly died of thirst. Once he went for five days without water before he was saved by a sudden shower. Once, he was saved by his horse. It refused to go the way Hsuan-Tsang wanted and took him to a pool of water.
   Sixteen years later, Hsuan-Tsang went back to China across the desert.
   What is the weather like in the Gobi Desert in summer?
细节题。夏天时，戈壁沙漠白天很炎热，到了晚上气温就骤降。