《由
北京市丰台区2014
高考模拟改编》
阅读下列短文,从每题所给的a、b、c、d四个选项中,选出最佳选项。
what is so amazing about giving blood?
the national blood service, which covers all of england and north wales, needs nearly two and a half million blood donations each year. when you give blood, you’ll be doing one of the most amazing things anybody could dream of