第一部分 阅读理解(共两节，满分40分)
第一节(共15小题；每小题2分，满分30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
According to a report，8 out of 10 Americans over the age of 25 are considered overweight.With fatness levels rising in America，it is necessary to stay in shape and maintain (保持) a healthy living style.Here are helpful tips on maintaining a healthy body and losing a few pounds slowly over the long term.
