题干
It took me quite a long time to get to the school. It was _______ journey.
A：three hour
B：a three-hours
C：a three-hour
D：three hours
答案(点此获取答案解析）
C
It took me quite a long time to get to the school. It was _______ journey.
A：three hour
B：a three-hours
C：a three-hour
D：three hours
分子中，位于同一平面上的原子数最多可能是（ ）