、Tom is a top student in our class , How        it be that he was a failure in the last exam?

— 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. 

(2010·四川高考)—________ I take the book out?—I'm afraid not.

One of our rules is that every teacher      wear school uniform while attending the school flag-rising ceremony. 

You _______be hungry already—you had lunch only two hours ago.