【D4】SPEAKER A: HERE ARE OUR TICKETS AND PASSPORTS. WE" RE FLYING TO AMSTERDAM TODAY. SPEA

【D4】

SPEAKER A: HERE ARE OUR TICKETS AND PASSPORTS. WE" RE FLYING TO AMSTERDAM TODAY. SPEAKER B: WELCOME TO YOUT

H. LET" S SE

E...YES, YOUR PASSPORTS ARE STILL VALID AND YOUR TICKETS ARE IN ORDER.【D1】______ 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 THE

M.【D2】______ SPEAKER A: NON-SMOKING, PLEAS

E. AND COULD WE HAVE ONE WINDOW SEAT, PLEASE？ SPEAKER B: LET ME SE

E. OH,【D3】______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 20

B. YOUR FLIGHT IS ON TIME, AND IT"S LEAVING FROM GATE 12. DON"T FORGET TO PAY THE AIRPORT TAX BEFORE YOU BOAR

D.【D4】______ SPEAKER A: THANKS A LOT. 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.

请帮忙给出正确答案和分析，谢谢！