Giving instructions 讲授 Asking for explanations 要求说明
查看答案
Reserving a flight 预订航班 Checking information 查询信息
Making a formal presentation 正式演讲 Giving an example举例说明
Order a meal 预订膳食 Asking for information 询问
Hiring a car 临时出租 Expressing arrangements 陈述约定
微信支付 
支付宝支付