旅游者购物后发现是残次品，要求导游员帮其退还，导游员应积极协助，必要时陪同前往。（ ）
参考答案：对
— Would you like to tell me ?
— Sure. Practice makes perfect.
A．how can I study English well
B．why do you learn English well
C．how I can study English well
D．why I learn English well
实习作业法
