—It’s a long time________I saw you last.—Yes,and what a pity it is now that it will be a long time________we see each other again.
You're fortunate________such a good chance.
It's impossible________back the wheel of history.
The bell________the end of the period rang, ________our heated discussion.
The policeman said the accident last night______careless driving, so much money________be paid by the driver.
The matter________your study surely requires________carefully.