阿摩線上測驗
33. All the workers have to work ____ to make sure that the machines
go smoothly through the night.
(A) in relays
(B) in return
(C) in advance
(D) in reality
答案：登入後查看
統計： A(227), B(113), C(153), D(16), E(0) #2003018
統計： A(227), B(113), C(153), D(16), E(0) #2003018
