服务礼仪的定义和范围是什么？
参考答案：服务礼仪，通常指的是礼仪在服务行业之内的具体运用。范围主要指服务人员在自己的工作岗位所应当严格遵守的行为规范。
When do you think we will leave tomorrow? You had better __ ready at seven o’clock.
A．to be
B．be
C．being
D．been
—We need a new leader for our Helping Hands Club, but I don't know _______.
—Why not Mary? She is always willing to help others. [ ]
A. what to choose
B. how to choose
C. when to choose
D. who to choose
