—Lily, _____ you _____ your ticket?—Not yet!
—Can you tell me ________ this morning?—Sorry,I've no idea.
—Tom, may I use your pen to the application (申请) form? —Sure. Here you are.
—How long will the summer English courses ?—For six weeks.
Smile to the world, the world will smile back to you.
A person who will travel to a foreign country must carry a .