The theory________by Einstein was later to prove true, but at that time few people could accept it .
—If you can _________ this goal, you will be in a much better position. —We'll do our best.
I _________ to go to the concert with my cousin, but on second thoughts, I gave up the idea.
Only after we have taken into consideration all aspects of the problem _________ the right decision.
Many people agree that never in history _________ a more splendid opening ceremony than that of the Beijing Olympics.
—Did you catch the train?—No. _________,I would have.