For some students, the computer serves only _____ a tool that is used to play games.
Whoever leaves the room last must ______ that all the lights are turned off.
--- I haven’t got a mobile phone. --- I think you should have ______. It’s useful for you.
Babies enjoy ______ before they go to sleep.
–Mum, I have been admitted into Hong Kong University. --Well done! ____________.
You ____ television. Why not do something more active?