根据下面对话 回答题。Dialogue OneSpeaker A: Here are our tic

根据下面对话，回答题。
Dialogue One
Speaker A: Here are our tickets and passports. We&39;re flying to Amsterdam today.
Speaker B: Welcome to Youth. Let’s see...yes, your passports are still valid and your tickets are in order.1___________
Speaker A: Just these two.
Speaker B: Please put them on the scales. Any carryon baggage?
Speaker A: Yes, two pieces. Oh, and this camera.
Speaker B: It’s better to put these identification tags on them.2___________
Speaker A: Nonsmoking, please. And could we have one window seat, please?
Speaker B: Let me see. Oh,3 ___________ All right. You’re all set. I’ve stapled your two baggage claim stubs to your return tickets.
Speaker A: These two?
Speaker B: Yes. And here are your boarding passes. You have seats 20A and 20B. Your flight is on time, and it’s leaving from Gate 12. Don’t forget to pay the airport tax before you board.4___________
Speaker A: Thanks a lot.
第1题__________ 查看材料
A.Do you want smoking or nonsmoking seats?
B.Have a pleasant flight
C.How many pieces do you want to check in?
D.here are two left
请帮忙给出正确答案和分析，谢谢！