______ we had read your letter ______ the true state of affairs.
| A．It was until; that we understood |
| B．It was not until; that we understood |
| C．Until; did not we understand |
| D．Not until; we understand |
Without facts, we can’t form a correct opinion, for we need to have actual knowledge _______ our thinking.
| A．which to be based on | B．which to base on |
| C．on which to base | D．which to base |
Recently we held a discussion about what we shall use for power when all the oil in the world has _________?
| A．run out of | B．used up | C．given out | D．put out |
--- What do you think of the jacket and the hat I wear today?
--- I don’t think this jacket _________ you and that your hat _______ this jacket perfectly.
| A．suits; fits | B．meets; fits | C．matches; suits | D．fits; matches |
Though my grandfather is in his eighties, he is still as _________ as a young man and hates sitting around doing nothing all day.
| A．enthusiastic | B．talkative | C．energetic | D．sensitive |
Despite the fact that I had been told about the local people’s attitude to strangers, in no case ________ any rudeness.
| A．did I meet | B．I met | C．had I met | D．I had met |