Johnny, you _________play with the knife, you_________ hurt yourself. 

— I didn’t care about what other people thought about me.— Well, you ________.

If people eat natural poisons by mistake, they ________ go to hospital without delay.

---May we leave the classroom now?---No, you      . You       to leave until the bell rings.

—Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.