Even a drop of water ______because it is so important to all the living things.

I am feeling sick now．I ________ so much chocolate．

— I can’t get through to the general manager’s office.—The line is busy. Someone ________ the telephone.

—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.

—Mother, I climbed up to that tall tree and picked this big apple.  —Jesus! You______ down and hurt yourself.