选择方框中的动词短语填空：

A. going up B. takes up C. slowed down D. heard of E. give up

 
We all know the population of the world is still_____.
It’s better to have a try than to _______.
Have you ______ Enya, a very famous singer.
The train has been ______,the station is just in front .
Please take the paper-box away, it ______too much space.