阿摩線上測驗
31. About （A）one-fifth（B）of all the energy used in the United States （C）it is changed into （D）electric power.
(A)one-fifth
(B)of all
(C)it is
(D)electric
答案：登入後查看
統計： A(1), B(26), C(46), D(5), E(0) #1524015
統計： A(1), B(26), C(46), D(5), E(0) #1524015
