— Alice, is this you dictionary?— Oh，no, it’s not _______.  Ask Tom. He is looking for ____.

— Hi, Mary. Could you lend ______ your pen?— Sorry, I’m using it.

—Jim, who taught ________Chinese before you came to school?—Nobody. I learned it by _______.

— What’s this in English?— _______ a quilt. 

I found ________ difficult to work out the problem without a computer.