Directions： Complete each of the following sentences with a suitable word.
1.He was put ____for the way he worked, especially when others were doing everything so effectively.
2.Pay increases will now be linked______ performance in almost all walks of life.
3.She cares deeply___ environmental issues and practices what she believes to be green in her everyday life.
4.I compared the copy_____ the original, but there was not much difference.
5.He is amazingly cheerful at the idea of what he is going to go _____ in the upcoming program.
6.Please don't hesitate to ask if you cannot keep track_____ what I'm telling you.