---Mom! May I have some cakes?---Sorry, there’s ________ left in the box. I will go and buy some for you this afternoon.
John’s father went to Nanjing ________ten days ago.
I __________ Beijing three times, I know there very well.
To my surprise, the tiny person is ___________my little finger.
Linda doesn’t know __________about her problems.
The train is running _____the speed of 200 kilometers per hour.