We're still at the airport. If it weren’t for the delayed flight, we _____the concert right now.
| A．can be enjoying | B．must have enjoyed |
| C．would be enjoying | D．should have enjoyed |
about a hundred years ago, the old stone bridge is still the only way linking the village to the outside.
| A．Building | B．Built |
| C．To build | D．Having built |
The last five yearsa great improvement in the relationship between the two countries, but there is still a long way to go.
| A．have seen | B．saw |
| C．sees | D．had seen |
My grandparents are fond of chatting with old neighbors in the yardthey have time.
| A．whichever | B．whenever |
| C．whoever | D．wherever |
Once a student is caughtin the exam, he will be severely punished.
| A．to be cheating | B．to cheat |
| C．cheating | D．cheated |
--Was there anything valuable in your missing bag, Madam?
--Yes, my purse and keys. Luckily, Ithe mobile phone.
| A．had used | B．would use |
| C．was using | D．have been using |