More and more people prefer to travel on plane because you can have a comfortable and qu

问题补充：

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; the

B. a; the

C. the; a

D. /; a

答案：

A. the; the

B. a; the

(答案→)C. the; a

D. /; a

解析：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。