---I think Miss Gao must be in the library. She said she would go there. ---No, she ___________ be there. I have just been there.

-- What’s wrong with your pen?-- The ink ___________ come out.

－Must we leave now?－No, we ________. We still have two more hours.

Don’t use water to put out the fire if oil catches fire. As is known, oil ____ float on water.

–Whose shirt is this?--It _______ be Li Lei’s. It is too big for him.