Tony couldn’t remember ______he had turned off the computer before he left the office.
A professor and writer ____ present at the meeting last night.
The boy at the back is the only one of the students who _____ from Africa in our school.
It is not I but you who ______ the first to run to the goal in that competition.
Each boy and each girl ______ a new book.
His brother rather than his parents ______.