单句改错：下面每句均有一处错误,指出并加以改正(很容易的,

单句改错：下面每句均有一处错误,指出并加以改正(很容易的,
( )1.His phone number is three,four,nine;zero,nine,two,eight.
( )2.It takes him half hour to get to work by car.
( )3.I'll go there instead him.
( )4.She rushed in the kitchen to save Mrs Sun.
( )5.He will be back after two hours.
( )6.Summer comes behind spring.
( )7.Mr Brown went to upstairs to walk to the man.
( )8.He can't sing a song at all.He sings very terriblely.
( )9.She said she would be back sooner or late.
( )10.Are you in the different grades？