Thanks to the measures ______ by the local government , the polluted river is becoming clearer andclearer and fish have begun to show up in it[ ]

We should save energy by _________ the lights when we leave a room.

On March 15, 2016, Lee Se-dol (李世时) _________ by Google’s AI in the final match．

Lingling,where________Tony_________from—He comes from England.

Charlie Chaplin is considered ________ agreat contribution to the film industry.