A study shows a ______ walk every day can keep people from becoming fat.A. 30-minute B. 30 minute’s C. 30 minutes’
--_____ you call back tomorrow? --Of course I can.
Our teacher often tells us ____ the windows before we leave.
There ____ some meat in the fridge, so you don’t need to buy any.
Tony wanted to take some good photos,______ he lost his camera.
Liu Xiang was born in Shanghai _____1983.