单项选择题

Questions 6 & 7 are based on the following news item. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news. However, they don’ t envision obtaining soil samples from Mars until ______ to try to ascertain whether there is water on the most Earth-like planet in our solar system and, possibly, life.

A.2001
B.2007
C.2011
D.2017