——Must I leave the room now?——No，you    .

If you have finished most of the work, you ______ start working so early tomorrow.

—Whose schoolbag is this?—It ___________ be Mary’s. It has her name on it.

Some young people these days just ________ go out of their homes to contact the real world．

— Mum, would you please buy me an MP5 player?— If you can help do some housework the whole vacation，you ____ have one as a reward.