A、700 yuan. B、800 yuan. C、900 yuan. D、1000 yuan. B问题问的是每月的房租是多少。根据男士所说800元可知，房租每月800元。故选B。

M：Good morning.Can I help you?
W：Yes.I wonder if you have a one-bedroom apartment to rent.
M：Let me check.Yes, we have one.It’s on Nanjing Street, near a shopping center and a subway station.
W：Sounds nice. Does it face south?
M：Well, the bedroom faces east and the living room north.
W：Mmm，is the living room large?
M：Yes, it’s quite big.And there’s a small kitchen and a bathroom as well.It’s very comfortable.
W：Well，what’s the rent per month?
M：800 yuan.
W：Mmm, it’s more than I have in mind.Let me think it over.I’ll call you back in a day or two.
M：Certainly.
Q17：Which direction does the living room face?
Q18：How many rooms are there in the apartment?
Q19：What is the rent per month?