The bicycle is one of the simplest yet most useful inventions in the world. What is most surprising is that it was not ___1__ earlier, although the great inventor Leonardo Da Vinci had drawn pictures
–I hear you __________ your report at the end of last week.–In fact, I __________ it by the end of last month.A. had finished; had finished B. finished; had finishedC. had finished; finished
