My head-teacher helped me a lot when I was in trouble. I do wish I could do something for him__________ one day.
A. in turn B. in common C. in return D. in theory
To come back before Sunday, I have made a few minor ________ to the schedule of my trip.
A. adjustments B. arrangement C. adoptions D. applications
--- He looks so tired. What’s wrong?
--- Nothing serious. He just stayed up last night, ___________his papers.
A. to prepare B. having prepared C. prepared D. preparing
He _________ desperately in vain for something to say to break the silence.
A. thought about B. cast about C. talked about D. set about
I doubt ____________all the people invited will come to attend the ceremony in such bad weather.
A. whether B. that C. how D. what
