I can’t quite remember ___ you started doing the work.
The hall of the school canone thousand people.
If you are able to talk to a friend over the telephone, you feel that you are close ____ the actual distance is not shortened.
—I felt it very difficult to carry on the work all by myself. —I could have helped you, but you _____me to.
Mr. Smith has bought a new house in the country, around ____ some green trees.
All the task ahead of time, they decided to go on holiday for a week.