阿摩線上測驗
6. _______ thousands of years, people have known that no two people have the same fingerprints.
(A) If
(B) At
(C) For
(D) On
答案：登入後查看
統計： A(10), B(33), C(389), D(32), E(0) #3234472
統計： A(10), B(33), C(389), D(32), E(0) #3234472
