（2）、Why did President Hayes ask Edison to go to the White House?
A、Because he wanted Edison to show him how the record player worked.B、Because Edison did something wrong.C、Because something was wrong with his record player.
（3）、What tune did they stay up?
A、Past three in the morning.B、Past two in the morning.C、Past one in the morning.
（4）、How did Edison's invention factory help Edison?
A、It made him popular.B、It helped him make his dream come true.C、It helped him make money.
