单项选择题
Shipment is an important part in international business.When goods are transported（），Bill of Lading is involved.
A.by airB.by seaC.on railD.on road
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（）.
单项选择题 （）do not maintain continuous eye-contact while talking with others.
