I had wanted to help you last night but I couldn't spare any time, for I___a composition which I have to hand in this morning.
His conclusion, ______ on careful research, was acceptable.
It was __________________ back home from work.
There is no reason why you shouldn’t tell the headmaster _________ that you are resigning because he has arranged your post.
It was with great joy the couple found their missing son after 18 years.
What ______ the doctors most was that they could not find the cause of the disease.