11. Statistics seemed to justify the common belief that Americans were devoted to periodicals.

　　[A] generate         [B] calculate         [C] modify        [D] prove

　　12. Born in 1863, Annie Fellows Johnston wrote stories for juveniles that became very popular and are still widely read.

　　[A] young people       [B] women         [C] foreigners        [D] sports fans

　　13. A dog's sense of smell is keener than that of a human being.

　　[A] more interesting     [B] more acute      [C] more appropriate      [D] more useful

　　14. The rules state that if a boxer is knocked down he must stay for a mandatory eight seconds.

　　[A] long              [B] delayed        [C] obligatory        [D] crucial

　　15. Logrolling is a sport in which contestants perform various maneuvers while treading on a floating log.

　　[A] speeches            [B] duties           [C] marches        [D] moves

　　Keys:   11～15 DABCD