Nelson Mandela is，__________ the greatest man of the 20th century，certainly among the most extraordinary leaders．
| A．if there | B．if any | C．if not | D．if so |
—Where _______?
—I got caught in the traffic, or I would have been here sooner.
| A．did you go | B．had you gone |
| C．have you been | D．were you going |
--- What’s reported in the news?
--- The earthquake yesterday is said _______ more than 5 hundred people.
| A．to kill | B．that it is | C．to have killed | D．that it has killed |
If he ___ me his telephone number yesterday, I ___ able to ring him up now.
| A．told, would be | B．had told, would have been |
| C．had told, would be | D．told, am |
The internet has made ____ possible for everyone to talk with friends miles away.
| A．that | B．this | C．one | D．it |
The _________ at the military academy is so rigid that students can hardly bear it.
| A．convention | B．confinement | C．principle | D．discipline |