Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.
This is not an economical way to get more water; ________, it is very expensive.
—Which of these two books will you take? —I’ll take ______, in case the journey is boring.
I know this is not quite the right word, but I can’t be bothered to think of _____.
His landlady gave him a week's _____ to leave the flat.
He is not______. He is the______ man in the streets.