1. London Olympic organizers said 2 years ago tickets for the London 2012 Olympics ______in the U.S and shipped 4,500 miles back to Britain.
A. would be printed B. would print C. were being printed D. had printed
2. Johannes Kepler discovered that the planets ______ in circular orbits around the sun.
A. do not move B. didn’t move C. hadn’t moved D. haven’t moved
3. ---I’m exhausted. I _____on a design day and night.
---You’d better have several days off after finishing it. Otherwise you might break down.
A. have been working B. have worked C. work D. worked
