How often do you help others？Here is a story of Luke Cameron．He's an American．He was born in 1988．He had a good friend called Jack，it was unlucky that Jack died from cancer（癌症）one year ago．After that Luke began to do at least a good time for people every day．

He helped old men cross the streets，bought gifts for some kids on their birthdays and gave out the food to the poor people．He also bought meals for several people at McDonald's，and even paid for a stranger's petrol（汽油）．He said he spent about﹩4，700dollars on good things last year．"In these days，we usually think about ourselves and forget to think about others，in fact，we are too selfish．We should help others and it can make our world much more beautiful and warmer．Nothing is better for me than to help others．"Luck said to the reporters happily．

Luke starts a website called The Good Deed Diary．com，he writes down every good thing he does on the website．Luck now has over 12，000 followers on his Facebook page．They all want to help others like Luke．

51．When did Luck start doing a good thing for people every day？　　

A．Before Jack died．

B．After Jack died．

C．Before he knew Jack．

D．When he knew Jack．

52．How much did he spend on good things last year？　　

A．﹩1988

B．﹩4700

C．﹩12000

D．﹩4500

53．What does the underlined word "selfish" means？　　

A．Think more about others．

B．Think less about oneself．

C．Think more about oneself．

D．Care more about others．

54．Which of the following is NOT true？　　

A．Some children often receive Luke's gifts on their birthdays．

B．Luke is a warm﹣hearted man who does lots of good things．

C．There are so many followers on Luke's Facebook page．

D．Luke has helped people a lot because he wants to learn from Jack．