---________ milk do you want?

---Three.

--- Work hard, or you will fail in the examination.

--- Well, I'll ________.

--- Look, the light in the teacher's office is still on. Mr Li is working there. He always works late at night.

--- It ________ be Mr Li. He has gone to London for a short visit.

--- Must I use both hands when I accept a present from a friend?

--- ________.

---Mr. Li, may I go home now?

---No, you ________. You should sweep the floor first.

--What isit？

--It is________ elbow．

--What do you think of the skirt?

--I like it very much．

--Please ________．

--Is Tom’spencil new or old？

--________．

-- Where's the library?

-- ________ behind the offices.