【正确答案】 B

【答案解析】[听力原文]
   A string of bombings ripped through Brussels Tuesday morning, claiming the lives of dozens of people and wounding hundreds. The attacks, which ISIS claimed responsibility for, add to an already deadly year of terrorism.
   In the first three months of the year, terrorists shed blood across all corners of the world. There have only been nine days without a significant terror attack. Aggregated reports show that at least 2,200 people have already died around the world due to terrorist activity as of March 22, 2016. So far, only 1 day in March has not been destroyed by terrorist attacks. Attacks claimed by or suspected to have been carried out by ISIS account for 20% of all terror attacks in 2016 thus far. So far, the biggest casualties of the terrorist attacks have been in the Middle East and Africa.
   What do we learn about the bombings from the news report?
此题问的是新闻报道中的爆炸案。新闻中提到周二上午，布鲁塞尔发生了一系列的爆炸案。故答案为B。