--- Good morning, Doctor Brown’s office.--- Hello, this is Johnson. Could you please tell Doctor Brown I ? My car won’t start.
Do you think everything _______was true?
It was Tom and his friends that________for the serious accidents.
He was reading a very interesting story, completely_______himself in the story.
Whoever invented _______wheel is believed to have made ______most useful invention in _______history.
The importance of saving gas_______be stressed too much. Automobiles use up some 70 billion gallons of gas a year.