第一部分：阅读理解（共20小题；每小题2，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
A
My mom just bought me a new bike. Since my cousin Mary didn’t have a bike with her, she walked next to me. I thought that Mary would jump on the luggage carrier (行李架) over the back tire when I was riding. Mom knew exactly what I was thinking. “Don’t ride the bike with Mary on the back,” she said. “It’s too dangerous. You could kill yourself. Take turns.”
