题目内容：
根据下面对话，回答题。Dialogue One
Speaker A: Here are our tickets and passports. We' 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 carry-on 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: Non-smoking, 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_______ A．Do you want smoking or non-smoking seats?
B．Have a pleasant flight.
C．How many pieces do you want to check in?
D．here are two left.
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