从方框中选择短语并用其适当形式填空。

throw away, bring back, pull down, upside down, put sth.to good use

The children made the picture _______.
We should know how to _______ our time ______.                             
It is easier ______ a house than to build up one.
I'll clean up my bedroom and _______ all of my useless junk.
These pictures _______ some sad memories.