Unit 12 Culture Shock
第Ⅰ卷
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。
Exercise is one of the few factors with a positive role in longterm maintenance of body weight.Unfortunately，that message has not gotten through to the average American，who would rather try switching to “light” beer and lowcalorie bread than increase physical exertion.The Centers for Disease Control，for example，found that fewer than onefourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet.
