单项选择题 You should use for a napkin only for your（）when dinning out .

单项选择题 If you found a insect in your soup when you are having a business meal，you should（）.

单项选择题 Shipment is an important part in international business.When goods are transported（），Bill of Lading is involved.

单项选择题 Don’t burp.It’s not cute and it’s not a compliment in most parts of the world.What is the meaning of the word "burp"？（）

单项选择题 It is inappropriate to ask for a doggy bag when you are a guest.Here，"doggy bag"means（）.