I can think of many cases _______ students obviously knew a lot of English words and expressions but couldn’t write a good essay.
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.