I had no idea how it______ that he should have been late for class three times a week.
Although punctual himself, the professor was quite used ________ late for his lecture.
________ I met her, she was working only in a small factory.
You have made a few spelling mistakes, but _______ you have done well.
He worked late last night, ______, early this morning.
He is seldom, ______, absent from school.