首先是题前的东西:un=not 例:unusual;co=together 例:coincidence;dis=not 例:dishonest;re=again 例:recycle

问题描述:

首先是题前的东西:un=not 例:unusual;co=together 例:coincidence;dis=not 例:dishonest;re=again 例:recycle
注:括号里的词和上面的四种里的一种形式相同(前面加un或co或.).
1、if two people write books together ,they are( );
2、if you give money back to someone again,you ( )them.

coorperating
return