单项选择题
M: May I help you W: Yes, I’d like to buy a swimming suit for my elder sister as a birthday present.
A. They are sisters. B. They are strangers. C. They are customer and shop assistant.
A. He attended a history lesson. B. He attended a chemistry lesson. C. He attended a meeting.
A. Because he didn’t want to borrow the book. B. Because there wasn’t such a book in the library. C. Because he was too busy to go to the library.