A few years after his graduation from a university, the man acquired the    of being a philosopher. 

Shortly after the accident, _____ policemen were sent to the spot to keep order.

It is________of you to turn down the radio while your sister is still in bed.

Jerry and Lily        the Internet to find out the shortest way to Xitang, an ancient town in China.

 The lack of eco-friendly habits among the public is thought to be a major ____ of global climate change.