Sir, a Mr. Wang is waiting for you at the gate. ________ he come in or stay there?
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.