31.A。细节题。题干：文章除了没有提到下列哪个因素外，其他都与致癌风险有关?根据命题顺序和关键词cancer risk可找到原文第一段的最后两句“The American Cancer Society team said this was the first time reduced risk was specifically linked to walking.UK experts said it was more evidence that lifestyle influenced cancer risk.”和第二段的第一句“…but being active is known to reduce the risk of a number of cancers.”可知散步、生活方式和运动都能降低癌症风险，唯独没有提及呼吸运动，故答案为A。

　　32.B。推断题。题干：从AIpa Patel博士的研究可推断出__________。根据关键词Alpa Patel’s study可找到第四段的倒数第二句“We were pleased to find that without any other recreational activity，just walking one hour a day was associated with a lower risk of breast cancer in these women.”，此项研究发现没有其他休闲活动，只是散步也可降低患乳腺癌的风险，由此可知B正确。

　　33.A。细节题。题干：Alpa Patel博士是__________。由关键词Alpa Patel可找到第四段的第一句“Dr.Alpa Patel，a senior epidemiologist at the American Cancer Society in Atlanta，Georgia，who led the study…”，由此可知Alpa Patel是美国癌症学会的高级流行病学家，他领导了这项研究，故答案是A。

　　34.A。细节题。题干：根据文章所述，下列哪项叙述是正确的?由第三段的倒数第二句“Of the women，47%said walking was their only recreational activity.”可知A项符合此意，是正确答案，其他选项均不对。

　　35.A。词汇题。题干：最后一段的“sustainable”与__________的意思最相近。sustainable出现在最后一段的最后一句话“…identify other sustainable lifestyle changes that will help us prevent breast cancer.”，这句话的意思是“确定其他可以忍受的生活方式的改变有助于预防乳腺癌”，sustainable意为“可以忍受的，可持续的”，由此可知A正确。