D,第一空选定冠词,特指那个社团,第二空说他是社团的一份子,成员很多,他只是其中之一,泛指What ____ pity that he has missed the chance!A.the B.a C.an D./John was elected ____ chairman of ____students'unionA.a,a B.a,the C.the,the D./,the谢谢What ____ pity that he has missed the chance!A.the B.a C.an D./John was elected ____ chairman of ____students'unionA.a,a B.a,the C.the,the D./,the答案:BC