These are your English books. But where are ________?

－ I need something for cutting the paper.－ Oh, you want a knife? OK, I'll get ______ for you.

Is this ___ magazine?No, it’s not _____. It belongs to ____.

My mother is Alice Johnson. ________ phone number is 2546809. 

Whatever you do, ________ is difficult if you put your heart into it.