unit 5 nelson mandela---a modern hero 第一节 单项填空（共15小题；每小题1分，满分15分） 1. though he failed many times in election, he never lost ___ __ heart and at last he was elected _______ president of the usa. a. /; a b. a; the c. his; the d. /; / 2. —shall we go out for a walk? — . a. good idea b. have fun c. good luck d. goodbye
