18．A.happened B．belonged

　　C．devoted D．turned

　　解析：选A　吉姆的妻子告诉医护人员吉姆所发生的事情。

　　19．A.politely B．easily

　　C．freely D．hard

　　解析：选D

　　20．A.broken B．open

　　C．strong D．long

　　解析：选A　根据下文的"Jim fell to the ground"可知，一名医护人员笑得太猛以至于吉姆从担架上掉落，弄折了胳膊。

　　Ⅳ.阅读七选五

　　The person behind you constantly kicks the back of your seat.Your talkative seatmate doesn't understand your need for sleep.And the aircraft's bathroom is a total mess.These situations can make even a short flight unbearable.Hopefully you don't cause these unpleasant experiences for others.__1__

　　Always recline (向后倾斜) your seat slowly.There's nothing worse than suddenly being hit in the knees by the seat in front of you.In addition, don't keep your seat reclined for the entire flight.Always keep it upright during mealtimes.And remember to put it in the upright position before going to the restroom (or anytime you leave your seat)．

　　__2__ Wait until the meal is done and all the food trays (盘子)have been collected.It's hard for passengers to stand up to let you pass when they still have their food trays.And when using the bathroom, always clean up after yourself - the next user will be grateful!

　　Keep your body and your possessions to yourself as much as possible so as not to crowd your in­flight seatmate(s)．Share the armrest, especially on a long flight.Also, be careful not to kick or push on the seat in front of you.

　　While some people enjoy chatting with other passengers during a flight, not everyone does.Some people may want to nap, read or work.__3__

　　If you are traveling with someone and want to chat, keep your voices low.__4__ People can still hear through your headphones if the volume is too high.

　　When exiting the plane, if others are having trouble with their carry­on luggage, help them if you can. If you can't help, wait patiently, and don't push past people to get off the airplane.On your flight, remember the golden rule: __5__

　　A．Don't leave your carry­on in the aircraft.

　　B．If the conversation seems one­sided, you should notice it.

　　C.Treat others the way you want to be treated!

D.Avoid going to the bathroom during mealtimes.