阿摩線上測驗
4.I find it difficult to ________ on my work when there is too much noise around me.
(A) concentrate
(B) converse
(C) conclude
(D) appoint
答案：登入後查看
統計： A(51), B(6), C(3), D(6), E(0) #3890910
統計： A(51), B(6), C(3), D(6), E(0) #3890910
