As a volunteer of the 2012 London Olympic Games, which sign will you prepare to remind people to keep the environment clean?
My mother gets up at five every day ________ prepare breakfast for us.
If you eat ________meat, you’ll be heavier.
--- How does Jack usually go to work? --- He _______ drive a car, but now he ________ there to lose weight(减肥).
---What's ________ wrong with you? --- I have ______ sore throat.
--Why is she at Xiao Ying’s home? --_________ they are friends.