How ________ I help them to understand when they don’t listen?

— I think Mr. Zhang may be in his office.— No, he _____ be there. I saw him ____ there just now.

—What do you think we can do for our aged parents?—You ____ do anything except to be with them and be yourself.

I__________through that bitter period without your generous help.     

－What made you _________ so happy?－Our class ________ Class Three in the basketball game yesterday.