i think you should move to a bigger house 改为it's b

问题补充：

i think you should move to a bigger house 改为its better to a bigger house 空里应该填什么?

答案：

its better for you to move to a bigger house.

======以下答案可供参考======

供参考答案1:

its better to move to a bigger house

供参考答案2:

its better for you to move to a bigger house