阿摩線上測驗
13. The Olympic swimmer was required to forfeit his gold medal after officials discovered that he had used illegal performance-________ drugs.
(A) aggregating
(B) enhancing
(C) relieving
(D) forecasting
答案：登入後查看
統計： A(0), B(1), C(0), D(0), E(0) #3985003
統計： A(0), B(1), C(0), D(0), E(0) #3985003
