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
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
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。