【单选题】

Questions 28 to 30 are based on the following news.At the end of the news item, you will be given 15 seconds to answer the questions.

Now, listen to the news.
According to MarkDoyle,Africa is so poorA．because of the systematic exploitation ofAfricans.
B．because of the unfavorable climate.
C．because the donation in the past didn’t work.
D．because of the war.

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根据网考网移动考试中心的统计，该试题：
50%的考友选择了A选项
15%的考友选择了B选项
29%的考友选择了C选项
6%的考友选择了D选项