5. It's located near the middle school and in a decent neighborhood.
房子位于中学附近的好地段。
还能这样说：
It adjoins the middle school and has a good neighborhood.
The surrounding around here seems to be nice and quiet and there is a middle school near it.
应用解析：
decently dressed 衣着体面的；
behave decently 规规矩矩地办事；
quite a decent fellow 很规矩的人
6. It is the just time to buy a house.
这是买房子的好时机。
还能这样说：
You need to buy a house at this time.
It's wise to buy a property nowadays.
应用解析：
just as they were 恰好如此，照原样；
just now 刚才，前一会儿；现在，这会儿；
just so 正是那样
7. What is the minimum amount of down payment that is required?
首期付款的最少金额是多少呢？
还能这样说：
How much should we pay for the down payment at least?
What is the minimum payment for the down payment?
应用解析：
an amount of 相当数量的；一些；
be of little amount 不重要；无价值；
in amount 总之，结局；总计；
in large amount 大量地；
never amount to anything 一事无成
8. We can afford to buy a house on mortgage.
我们可以按揭买房。
还能这样说：
We can have a mortgage purchase.
Mortgage purchase is available to us.
应用解析：
can't afford to buy sth. 买不起……
can't afford to waste sth. 浪费不起