_______ August 2009, he went to England.

I go to school ________ bus everymorning.

We have been expecting Rio 2016 Olympics_______ the Olympic flame(圣火) was lit.

_____ the global financial crisis, the Chinese government has taken many measures _____peoples life todeal with it.

What’s the matter with the man hanging his head there?— Well, if you _____ know, he was caught stealing my bike.