______ a little more time to think, he might have acted more sensibly.
It gives his life a flying start ______ he has gone abroad for further education.
The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.
What is the best way you can imagine ______the overuse of water in our school?
—Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copper Field with you. — _____ Who knows when he will be back here again?
—I’d like a pen which _________ well. —Will this one _________?