One day，7-year-old Sarah watched her mother roasting （烤） a piece of beef sirloin （里脊）．She cut off the ends，wrapped （捆）it，cooked it and finally it was OK．Then she covered it with gravy．
   When Mom served it to Sarah，Sarah asked， "Why did you cut off the ends of the roast，Mom？Is it a traditional way of cooking？" Mom answered，after thinking for a minute，that it was the way that her mother cooked it．
   That night Grandma came to dinner．Sarah and her mother asked why she cut the end off of the roast before cooking．After thinking，Grandma said she cooked the meat the way as her mother did．
   Great-grandma was quite old and lived in a residential nursing home （養(yǎng)老院） in England．One day，Sarah，her mom and grandma went to visit her and again asked the same question．
   Great-grandma was a little surprised．She looked at them and said， "So it would fit in （適合） the roasting plate，of course．"

（1）How much beef sirloin did Sarah's mother roast？

A piece of beef sirloin．

A piece of beef sirloin．

（2）What did Sarah's mother put on the beef sirloin at last？

Gravy．

Gravy．

（3）Who taught Sarah's mother to cook the beef sirloin in this way？

Her mother．

Her mother．

（4）Did Sarah's grandma know why she cut the ends of the beef sirloin off before cooking？

No，she didn't．

No，she didn't．

（5）Which country does Sarah's great-grandma live？

England．

England．