单项选择题
Questions 27 and 28 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
What is the purpose of the meeting in Luxembourg（）
A．To control patrol boats on the River Danube.
B．To end economic sanctions against Serbia.
C．To step up economic sanctions against Serbia.
D．To send police officers to search the river.