阿摩線上測驗
16 The product is affordable, ______ it is very popular among students.
(A) so
(B) but
(C) because
(D) although
答案：登入後查看
統計： A(111), B(4), C(28), D(8), E(0) #3744890
統計： A(111), B(4), C(28), D(8), E(0) #3744890
