six
                    - Six million, six hundred and sixty-six thousand, six hundred and sixty-six is________.
 - dollars is a lot of money for me.
 - Where is Class________ ?It’s on the ______ floor.
 - Last year, I visited a chemical factory in Baise, there are about _____ workers in it.
 - It is said that ____ young people may lose the abilities to hear after five years if they listen to MP4 players which are too loud for more than five hours a week.
 - My car number is 53659.It reads(读作)
 - The earth is years old.
 - Sun Tao has had a_______ English course, but he still doesn’t know
 - 英语数字6,500,431,729读成____________.
 - Can you write the number eighty-five thousand, six hundred and twenty-six ? —-Yes,it is_________