找考题网-背景图
单项选择题


Questions 7 and 8 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 main idea of the news item

A.Somalia is re-infected with polio virus.
B.Somalia has successfully eradicated polio.
C.Somalia suffers from indigenous polio.
D.Polio still persists in developing countries.