一道改错题John Smith,atypical American businessman,rode to work o

一道改错题
John Smith,atypical American businessman,rode to work on the subway one ordinary morning.He got off his station downtown and 1.( )
walk to his office building.At the entrance,a 2.( )
guard was standing there check employees'ID cards.3.( )
John reached into his pockets,but his wallet wasn't 4.( )
there!He was sure about he had taken it from the dresser 5.( )
on that morning.Of course he had,because it 6.( )
contained his subway pass,that got him on the train.7.( )
John checked his other pockets,so his wallet 8.( )
was nowhere to be found.Someone has stolen 9.( )
that on the subway His day was ruined!He couldn't 10.( )
even get into his own office.