There is no doubt _______international cooperation is the key to dealing with cyber crime.
| A．then | B．that | C． wheather | D．this |
It was _____ great shock to the world that two airplanes crashed into _____ World Trade Centre in New York on Sept．11．
| A．a；／ | B．the；the |
| C．a；the | D．／；the |
It was the training _______ he had at school _______ made him good jumper．
| A．what；what | B．that；that |
| C．what；that | D．that；had |
Why didn't you tell me there was no meeting today? I _____ all the way here _____the heavy snow.
| A．needn't have driven；through | B．can't have driven；across |
| C．mustn't have driven；through | D．shouldn't have driven；cross |
Never _______ forget the days when _______ together with you．
| A．shall I；I lived | B．shall I；did I live |
| C．I shall；I lived | D．I shall；did I live |
The two old sisters，_______ so long，held each other and burst into tears．
| A．being separated | B．having been separated |
| C．having separated | D．had been separated |