My mother is ill. I _______stay at home and look after her.
It seemed to me that she was in doubt ________ Timmy lived or died.
—________ you write so well?—By reading and keeping diaries every day.
It is a teacher's responsibility always to hope, ________ with learning, a boy's character might be changed.
What I like about Harvard is ________ there's the old classical look—there are parks and traditional buildings.
________ left the door unlocked must be held responsible for the accident.