阿摩線上測驗
20. Chris ______ professionally for a number of years before he finally won his first chess championship last year.
(A) competes
(B) competed
(C) has competed
(D) had competed
答案：登入後查看
統計： A(0), B(1), C(7), D(22), E(0) #3887967
統計： A(0), B(1), C(7), D(22), E(0) #3887967
