—Does your sister work as a teacher in Canada? —No, but she once  _________there for five years．

Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.

 Mr. Johnson insisted that he _____ his debts, but nobody believed him. 

—Anything special in today’s papers?—Yes. “Confidence is more important than gold” by Premier Wen ________as a headline in many of today’s newspapers.

He ________ to the lab than he set out to do the experiment.