单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Which of the following is NOT mentioned in this passage

A.Volunteers work in Africa.
B.Soldiers occasionally save children in Iraq.
C.Those without homes or food in our own borders are attended.
D.People within our own borders are powerless.