出材率与( )之和等于100%。
A. 成本毛利率
B. 销售毛利率
C. 损耗率
D. 成本率
The words "host and hostess" in the last paragraph of Letter B mean ______.
A. people who go to a party
B. people who cook dinner
C. people who hold a party
D. people who send invitations
Letter B was written to tell that ______.
A. you always bring a nice gift when you go to a dinner party
B. you just watch the guests at a party and follow them, and don't be shy about asking questions
C. the Americans and Canadians like having a lot of dinner parties
D. if you follow a few rules of dinner parties, you will have a good time at the party
Etty Kit may be ______.
A. Confused's close friend
B. a person who gives advice about personal problems
C. a person who always holds parties
D. a flower or a candy seller
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