What made you choose the one rather than the other?
你怎么选了这个而不是那个？
They've chosen a site for the new school.
他们为新学校选了校址。
This site has been chosen for the new school.
这块场地已被选作新学校的校址。
Whatever system you choose, it must be run in properly.
不管你选择什么样的体系，都必须经过适当的.磨合。
With digital you can choose the camera angle you want.
有了数字电视你就可以选择你所需要的摄像角度。