—I find it very difficult to read ________ novel you lent me last week.—Yes. It's necessary to have ________ good knowledge of history.
—Would you like to play bridge with us? —Sorry. __________.
Please let me know __________ you want to go or not.
It took __________ building supplies to construct these energy-saving houses. It took brains, too.
__________ is a good chance that I'll finish the work tomorrow.
Why are you in such __________ hurry? As __________ matter of fact, I will take __________ same flight as you.