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　　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