I was just talking to Margaret when Jackson __________
_______ didn't attend the lecture yesterday won't be given full marks.
It could be learned from the teacher's eyes ________ he was very satisfied with her performance.
—How will you deal with these papers, Ann? —I will leave them to ________ takes over the job.
—What upsets him? —________ his computer is out of order.
Whether ways will be found to stop pullution or not is just ________ worries the public.