Flying across the globe, whether on business or for leisure, is usually effortless——you ju

Flying across the globe, whether on business or for leisure, is usually effortless——you just have to book your ticket, pack your bags and show up at the airport with your passport. You board the plane and several cocktails and movies later, you arrive at your destination, and hopefully, your baggage does too. Here are some tips on how to be a clever traveler.
Easy check-in
Avoid the queue and check yourself in by using the MAS Web Check-In (malaysiaairlines.) in the fort of your own home or office. Passengers can now check in online anytime from 24 hours to 90 minutes ahead of the scheduled departure time. This is available for flights departing from all MAS stations ——except Paris, Kunming, Xiamen and Bandar Seri Begawan——to all MAS destinations. You can even select preferred seats online.
Bag hygiene
No, we’re not talking about the cleanliness of your bags! It’s the aviation talk for a bag that doesn’t carry any old baggage tags with barcodes that could confuse the baggage sensor（传感器）.
If you find yourself arriving in Sydney while your bag lands in Tokyo, it could be because of your old baggage tag. Another reason why bags go missing could be the printing quality of the barcode; bags are misdirected because the sensors can’t read the codes correctly.
Less is more
Most airports around the world now set a weight limit of 32kg per piece of baggage. This will not only help protect the airline workers’ health, but also be easier for you to carry your bags around.
Avoid packing dangerous goods or placing valuables inside your check-in luggage. Ensure that locks are properly secured as a lot of baggage locks are found caught between the conveyor belts（传送带）. Smaller and softer bags are usually placed inside a tray at check-in to protect the locks from contact with the conveyor belt.
【小题1】According to the passage, airplane passengers     .A．can check in without going to the airportB．have to check in 90 minutes earlierC．are required to check in on the MAS webD．can select their favorite seats when getting aboard【小题2】What’s the meaning of the underlined word “hygiene” in the passage? A．Disappearance.B．Protection.C．Check. D．Cleanliness.【小题3】Why does baggage sometimes go 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 the bag.
d. The bags are too heavy to check. A．a, b B．b, c C．c, d D．b, d【小题4】 Which of the following statements is TRUR about check-in baggage? A．Each piece can weigh 30 kg at the most. B．Smaller and softer bags should be separated from other ones. C．Valuable things should be kept inside a tray.D．Bags containing dangerous things can be caught on the conveyor belts.A