单项选择题


Questions 27 ~ 28 are based on the following news from the BBC or the VOA. At the end of the news item, you will be given 10 seconds to answer the three questions.
Now listen to the news.
The US military says the joint military action is aimed to _______.

A.drive off Iraqi planes in the no-fly zone
B.ensure a safe environment for planes patrolling the no-fly zone
C.wipe out Iraqi air force
D.support anti-government groups in Iraq