Question

[答案] 3. [原文] Brain cancer is a concern that Ms Davis examines. Over all,there has not been an increase in its incidence since cellphones arrived. But the average marks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.

[问题]According to Ms Davis,brain cancer increases     

   A. among children

   B. among old people

   C. in the twenties

   D. among pregnant women

[答案]        

Answer 1

3. C 文中the average marks an increase in brain cancer in the 20-to-29 age group和brain cancer increases in the twenties是同义表达。此处in the twenties和in the 20-to-29 age是同义改写。