—What are you doing, John? Why stop?—To be on the safe side, we’d fill up the car now for we _______ run out of gas on the way.
I'd like to write the letter with a ballpen. Could you please find________for me?
—Can I speak to Mr. Wang, please? —________
No matter what you say, I shall________my opinion.
The Panama Canal________the Atlantic________the Pacific.
—He promised to come to see you. —But he________. I've been alone.