You need to _____ your cell phone when you are on board a plane.
(A)turn off
(B)turn down
(C)turn on
(D)turn up
答案:登入後查看
統計: A(3546), B(109), C(128), D(47), E(0) #332494
統計: A(3546), B(109), C(128), D(47), E(0) #332494