问题
选择题
One reason why_____plane is such a popular means of_____transport is that it is very fast and safe.
A．the; /
B．a; the
C．a;/
D．the; the
答案
答案：A
不定冠词a与可数名词plane连用, 表类指“飞机”这类事物; a means of transport为固定搭配. transport前不用冠词。