-I called you at 2:00pm yesterday, but there was no answer.-Oh, sorry! I __________ in the garden at that time.

All of my teachers but the math teacher ______ he cheated in the exam.

Peter, perhaps John, ____ playing with the little dog.

 ---- _________you or he the teacher of English? ----Neither my sister nor my mother _________present at the meeting.

John is one of the staff members who ___to be sent abroad for further study.