Questions 9 and 10 are based on the
following news. At the end of the news item, you will be given 20 seconds to
answer the questions. Now listen to the news.
According to the news item, the atmosphere that blocks harmful
ultraviolet rays
A. shrinks and expands regularly recently.
B. is closely connected to sun’s activity.
C. absorbs carbon dioxide at high altitude.
D. is largely influenced by the movement of satellites.