A． new engine
B． strong material
C． proper maintenanc
D． new interio
参考答案D
解析:细节题。由“From a safety standpoint，a lot of the older planes were built tougher and with proper maintenance…its engines and other major systems could have been recently manufactured or upgraded，”可知，[A]、[B]和[c]三个选项都是飞机可以持续安全航行20多年的因素，由“There’s less pressure On the amines to upgrade the interior，unless it’s a safety issue or a redesign that will save money；”得知，[D]new interior只有在出现安全问题或者有更加省钱的设计时才会考虑，因此答案为[D]。
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单选题
Which job will involve supervising workers using dangerous equipment?
[A] Assistant site manager.
[B] Carpenter supervisor.
[C] Assembly supervisor.
[D] Automobile service station manager.
Which job will involve supervising workers using dangerous equipment?
[A] Assistant site manager.
[B] Carpenter supervisor.
[C] Assembly supervisor.
[D] Automobile service station manager.
A． Airlines' flight service manager,
B． Automobile service station manage
C． Assistant site manage
D． Carpenter superviso
A． Assistant site manage
B． Airlines' flight service manage
C． Assembly superviso
D． Carpenter superviso