Rainforests _______ and burned at such a speed that they will disappear from the earth in the      near future.

I first met your sister ten years ago, when she ____at a supermarket as a salesgirl. 

—Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here.

The computer looks old, but it _________ just half a year ago.

 I ____ Mr. White at that time, otherwise I wouldn’t have asked you for some information about him.