--- How _____ hours do you sleep a day?--- Well, about eight hours. But how _____ sleep do we students really need?
— Hi, Jim! Is this your bike or Mary’s? — It’s mine, not ______.
There is going to _______ a football match on CCTV-5 this evening.
— Why are you standing, Alice?— I can’t see the blackboard clearly. Two tall boys are sitting ______ me.
Helen is ______ office worker in a big company near Xinjiekou.
—We got here on Monday morning.—______ Why didn’t you call me earlier?