The reason the Greens are happy to live the old house is that there is aprimary school and a junior middle school ( ) their reach.A within B beyond C without D upon请解释每一个选项.
问题描述：
The reason the Greens are happy to live the old house is that there is aprimary school and a junior middle school ( ) their reach.
A within B beyond C without D upon
请解释每一个选项.
答