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
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