单选题 《复合题被拆开情况》Attendant：Can I help you, sir?Customer：Yes, I’ve been sitting here for a few minutes.【D5】_________Attendant：I’m sorry, sir. But this is the self-service pump.Customer： Self-service?Attendant：Yes.【D6】__________Customer：Are you serious?Attendant：Yes.【D7】__________Customer：Yes, I’m from Taiwan. I never heard of a gas station where you fill up your own car.Attendant：In America, most gas stations are like this.A. Of course.B. Are you traveling here?C. I’m waiting for someone to put gas in my car.D. You must fill up the car yourself. 《问题》：【D6】