Online music providers in China hope to set up a plan that will charge individual users for music    

 Don’t ______ personal information such as your name， telephone number and address until you feel comfortable.

Ladies and gentlemen, please remain _____until the plane has come to a complete stop. 

---You____ part in the party on time.--- Sorry, I was delayed by the accident.

Their class is __ a camera, a TV and a computer.