Smaller and softer bags are usually placed inside a tray at check-in to protect the locks from contact with the conveyor belt.

　　54．The passage mainly tends to tell us how to travel________.

　　A．in a comfortable way

　　B．in a fashionable way

　　C．in a neat and orderly way

　　D．in a cheap and safe way

　　55．From the passage，we can know that passengers________.

　　A．can check in without going to the airport

　　B．have to check in 24 hours earlier

　　C．are required to check in on the MAS Web

　　D．can select their favorite seats when getting aboard

　　56．What are the reasons why the baggage is often missing according to the passage?

　　a．The bags are too old and dirty.

　　b．The sensors can’t read the barcodes correctly.

　　c．The old tag is still on your bag.

　　d．The bags are too heavy to check in.

　　A．a；b

　　B．b；c

　　C．c；d

　　D．b；d

　　57．Judging from the writing style of the passage，it is________.

　　A．a piece of advertisement

　　B．a science report

　　C．a passage for professional reading

　　D．a passage from a magazine

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