Only 16 percent of China’s area ____ covered with forests, so ____of us should protect trees. 

—Lu does work hard. —Yeah. _____ of his time ______been spent on studies every day. 

The number of chairs in the room_____ten.I’m afraid a number of chairs in the room____lost.

Not only I but also Jane and Kate ___ tired of  reading one book after another.

       some juice and milk in our fridge(冰箱).