One of the (d )of traveling by plane is that it is very expensive.根据首写字母填空.
问题描述：
One of the (d )of traveling by plane is that it is very expensive.根据首写字母填空.
答
disadvantages
答
disadvantages 缺点 one of+复数
答
disadvantages缺点
乘飞机旅行的缺点之一是太贵了
答
defects / drawbacks