Ⅰ.单项填空
1．Over the years，people have learned from ants that teamwork and perseverance are indeed two key to success.
A．certificates B．ingredients
C．approaches D．instructions
答案 B
解析 句意为：多年来，人们从蚂蚁那里学到，团队精神和毅力的确是成功的两个关键要素。certificate证书；ingredient配料，要素；approach方法；instruction指导。故选B。
