第一部分: 阅读理解（共20小题；每小题2分，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
Take a deep breath and drink some water for 15 seconds! This is just one of hundreds of tips you might get if you have the hiccups(打嗝). Hiccups are so mysterious that we really don’t know why they start and why they stop.
