—I remember you were a talented pianist at college.Can you play the piano for me?—Sorry，I ________ the piano for years.(2012·湖南)

The famous reporter, who is said to go back to America next month, _____in China for almost twenty years. 

I know little about the accident because not much ______ about it up to now.

In the last few years thousands of films ________ all over the world.

 The house is dirty because it ________ since they moved out.