They asked me to have a drink with them. I said that it was at least ten years since I __________ a good drink
Mr. Smith, ______ in the factory for thirty years, is on the way back to his village.
—How was that? —I was chatting on line _____ the power went out.
Our teacher always speaks slowly and clearly in class _____.
—Are you satisfied with the answer? —Not at all. It couldn't have been ______.
By the time Mr Wang returned home from Beijing, his son's wedding _______.