----_______an earthquake happens in Quanzhou when we are having a lesson ? ---- I’m afraid most of us will be trapped.
_____ 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.