section-C-24 The endurance and consistency of baseball star Lou Gehrig, known as “The Iron Horse,” are legendary. B A (A) The endurance and consistency of baseball star Lou Gehrig, known as “The Iron Horse,” are legendary. (B) The endurance and consistency of Lou Gehrig, a baseball star known as “The Iron Horse,” is legendary. (C) Known as “The Iron Horse,” the endurance and consistency of Lou Gehrig, the baseball star, is legendary. (D) The reason baseball star Lou Gehrig is known as “The Iron Horse” is because of his legendary endurance and consistency.（A） (E) Known as “The Iron Horse,” baseball star Lou Gehrig’s endurance and consistency are legendary. SECTION-B-15 The increased popularity and availability of televisions has led to the decline of regional dialects, language variations which originate from diverse ethnic and cultural heritages and perpetuated by geographic isolation. (A) which originate from diverse ethnic and cultural heritages and perpetuated (B) that originated from diverse ethnic and cultural heritages and perpetuated (C) originated from diverse ethnic and cultural heritages and perpetuated (D) originating from diverse ethnic and cultural heritages and perpetuated（D） (E) originating from diverse ethnic and cultural heritages and perpetuating 到底怎么区别 请牛人指点 | 
