When I entered the room, I found a little boy _____ on his mother’s knees _____ to draw a picture.
_____ well prepared you are, you still need a lot of luck in mountain climbing.
_____ from the fifth floor when the policemen surrounded him.
The boy, _____ parents went to the US last year, felt lonely.
Finally, the thief handed everything ____ he had stolen to the police.
_____ in 2008 ___ the Olympic Games were held in Beijing.