O-8：on one's behalf 代表某人
A:Good morning，Miss. I'd like to see Mr. Johnson.
A:早上好，小姐，我想见约翰逊先生。
B:May I have your name，please
B:您叫什么名字?
A:My name is Jones.
A:我叫琼斯。
B:I'm sorry，Miss Jones. Mr. Johnson is out，but his assistant is expecting you on his behalf.
B:对不起，琼斯小姐，约翰先生出去了，不过他的助手在代他等你。
