人教版七年级下册英语新目标检测 Module 4 Unit 2 第二题的第二小题怎么写?急.

题目

人教版七年级下册英语新目标检测 Module 4 Unit 2 第二题的第二小题怎么写?急.
课文(关于此题的一小段)：
We won't travel by bus or bike any more.Every family will have a small plane.No more expensive cars --- it'll be cheap to travel everywhere by plane,not only over land,but also over the sea or even into space.Maybe there'll be traffic jams in the air.
Why won't people travel by bus or bike in the future?

答案

Because every family will have a small plane and it will be cheap to travel everywhere by plane.