A US man has shown off a 14-year-old McDonald's hamburger that looks the same as the day he       it.
David Whipple, from Utah, had originally(起初) planned to       the burger for two months in order to show friends how its preservatives（防腐剂） would keep its appearance.
But, after accidentally leaving       in his pocket for two years, Mr Whipple decided to keep the burger for even longer to see       it could continue looking the same.
“It wasn't on purpose,” Mr. Whipple told US television show “The Doctors”.
“I was showing some       how enzymes（酶）work and I thought a hamburger would be a       . And I used it for a month and then       about it. My wife didn't      it until at least a year or two after that. And we pulled it out from the closet(衣柜) and said 'oh my gosh, I can't believe it looks the same way'.”
He now admits that he uses the burger to convince（说服） his grandchildren not to eat junk food from restaurants         McDonalds.
“It's great for the grandkids to see. what happens with      !” he said.

A．bought B．lost C．ate D．made

A．hide B．keep C．cook D．stay

A．the bag B．the coat C．the product D．preservatives

A．how soon B．how far C．how often D．how long

A．doctors B．students C．grandchildren D．friends

A．good idea B．junk food C．healthy food D．terrible idea

A．thought B．forgot C．ate D．talked

A．throw B．buy C．discover D．get

A．for example B．except C．and D．such as

A．fast food B．sea food C．McDonalds D．American restaurants