When people move to another country, they often try to________ the customs of their native land.

A．turn on

B．bring up

C．keep up

D．give up

选购塑料地板时应注意以下几个方面（）。

A.材料的质量等级

B.塑料地面颜色和图案

C.选购的数量和方法

D.色差及吸水率状况