Our maths teacher set so difficult an examinationproblem ______ none of us worked out.

Will you please _________ them _________ awriting competition

This kind of drink tastes good, but there’s in this bottle. I’d like some more.

I can’t get on with some of my classmatesThey just leave me in the cold—______ But what’s the reason

saster-stricken village was inaccessible_______ by helicopter, and the storm added to the rescuers’ difficulty