A、$60 per night. B、$ 50 per night. C、$40 per night. D、$ 10 per night. C这是一道计算题。根据对话内容，房间原价是50美元，这个月入住可以享受八折优惠，因此房间的实际价格是40美元。注意2

W: Hello, may I help you?
    M: Yes, I’d like to book a room for tomorrow.
    W: Which kind of room do you prefer, sir?
    M: A double room. How much is it?
    W: A standard double room is $ 50 per night. But we offer a 20% discount this month.
    M: Oh, that’s great. How about the environment?
    W: It’s very comfortable, with a view of the sea.
    M: OK, I’ll take it. My name is Martin.
    W: OK, Mr. Martin. See you tomorrow.
    M: Thank you. Bye!
    8. Which kind of room does the man want to book?
    9. How much is the room?
    10. How is the living environment of the room?