根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Mr. Jackson realized that his sons had a lot of talents.  71  In those days there were plenty of music groups and some of them were very good．He knew if his sons were to stand out，they would have to be the best.   72  And the Jackson boys practiced! Gradually the group took shape. When they took the first professional job，their total pay was only five dollars．They kept on working. They played at parties.   73  They worked at clubs.   74   Their first album sold a million copies! Michael, 11 years old then, was the star. It just didn’t seem possible that so much talent could come from such a young performer.   75  One million records of his were sold in New Zealand, which has only a total population of three million.

A．They entered bigger contest.

B．Then Michael got a chance to do some solo songs.

C．He knew he could train them to become fine musicians.

D．And he was proud of them very much.

E. Practice makes perfect.
F. All of a sudden．the Jackson Five became popular in the country.
G. But he indeed did it greatly.