__________ we had read your letter __________ the true state of affairs.
| A．It was until; that we understood | B．It was not until; we understood |
| C．Until; did not we understood | D．Not until; did we understood |
——Excuse me! Sir, is the swimming pool open all day?
——________.Only from 6:00 p.m. to 10:00 p.m.
| A．That’s right | B．Yes,of course |
| C．Sorry, I’m not sure | D．Sorry, I’m afraid not. |
——Are you satisfied with his answer?
——Not at all. It couldn’t have been________.
| A．the worst | B．better | C．worse | D．so bad |
The universities have got bigger in size , ________many more middle school graduates the chance of higher education.
| A．allows | B．allowing | C．allowed | D．to allow |
All the employers except the manager________to work on line at home.
| A．encourages | B．is encouraged | C．encourage | D．are encouraged |
All but one________take part in the conference________ tomorrow.
| A．is going to; that is to take place |
| B．is going to; that is about to take place |
| C．are going to; that is to be taken place |
| D．are going to; which is to be held. |