John left the United States in 1969

John left the United States in 1969 to work in Africa. Africa was hot. When John 1 to the UnitedStates in 1979 he said to himself " It's much 2 here than it was before I left. I'm going to 3 an electricheater (电热器). Besides everything is much more 4 ." John went to a store the next day to buy an electric heater. The salesman 5 him three or four 6 kinds and then said " And this is our best electric heater. It 7 a lot but it 8 half of your electricity (电)and electricity is very expensive now isn't it?" "Yes it's very expensive " John answered " and it's becoming 9 every year." He looked at theelectric heater carefully thought for a few seconds and then said "Well I'll take 10 of these then I'llsave all of my electricity.