A、Because she has drunk too much already. B、Because she isn’t a good drinker. C、Because she’s going to drive tonight. D、Because

Ken     ：Hello, Rob.
Rob     ：Hello, Ken... Hello Barbara. Come in. Shall I take your coats?
Ken     ：Thank you very much. What a lovely house!
Rob     ：I’m glad you like it.
Ken     ：Where’ s Anna?
Rob     ：Oh, she’s in the kitchen. She’ll be here in a minute. Just go into the dining room. How about a drink before dinner?
Ken     ：That’s a good idea.
Anna    ：Here we are...,dinner’s ready. Sit down, everybody.
Barbara  ：Thank you very much, Anna. Everything looks wonderful, and it smells delicious, too.
Anna    ：I’ll put the salad in the middle of the table. Shall I serve you?
Barbara  : No, it’s all right. We can help ourselves.
Anna    : Rob, could you pour the wine, please? Ken, help yourself to the vegetables, too.
Rob     : Would you like some mere brandy, Barbara?
Barbara  : Oh, no, thanks, no more for me. I’m driving tonight.
Rob     : Oh, come on, just a little.
Barbara  : No, really, I mustn’t. Let me help you with the washing-up.
Rob     : The washing-up! No, no, don’t worry. We always leave that until the morning.
Rob     : Here are your coats.
Ken     : Thanks. It’s been a marvelous evening. It was very kind of you to invite us.
Anna    : Don’t mention it. It was very nice to see you again.
Barbara  : Well, we enjoyed ourselves very much.
Rob     : We’re so glad, you must come again.
Ken     : Good ,fight, and thanks again.
Anna    : Good night, and drive carefully. It’s a very wet night.