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More and more people prefer to travel on ______ plane, because you can have a comfortable and quick journey, but make sure you get ______ safe one.     
A.the; theB.a; theC.the; aD./; a
C
 可数名词前加代表一类人或事物, 第一空用the.表示类别;one 前有形容词safe修饰,第二个空用不定冠词表示泛指。
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