阿摩線上測驗
5. When you enter a construction site, you must wear a helmet to _____ your head.
(A) shake
(B) protect
(C) knock
(D) change
答案：登入後查看
統計： A(12), B(671), C(16), D(5), E(0) #2571059
統計： A(12), B(671), C(16), D(5), E(0) #2571059
