— I want someone to write the composition for me. 　— No! It’s a rule in our school that as a student, you _______ depend on yourself. 

--- The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?---____ my students have a try?

If Doric continue doing things like that, he _______ face the music one day！

-----Someone is knocking at the door.It ____ be Tom .-----No, it ______ be him ;he has gone to Sydney.

I looked everywhere for the book, but I ______find it