（2016高考训练）阅读下列材料，从每题所给的选项中选出最佳选项。
体裁：记叙文 话题：教育 词数：298 时间：5′
Ebola(埃博拉病毒) has struck hard in Sierra Leone (塞拉利昂共和国)．More than one million children have been unable to attend school because the spread of the disease is so fast.But classes are now broadcast on 41 radio stations.The educational programs are airing three hours daily，five days a week.
