. — Flight 551 for Dalas ______. I must be off now.
— Have a pleasant trip then.
| A．is being announced | B．has announced | C．was announcing | D．had been announced |
Neither Tom nor Jack and I ______his students, but each of us _____ gone to the hospital to see him.
| A．am; has | B．is; has | C．are; has | D．was; have |
“ They went to the lecture, but it had been put off.” “ Oh, so they _______.”
| A．needn’t have gone | B．should have gone |
| C．mustn’t have gone | D．don’t need to go |
It’s difficult for him to without a car.
| A．get off | B．get in | C．get on | D．get around |
By no means ___to your parents.
| A．is this the first time you are lying |
| B．this is the first time you have lied |
| C．this is the first time you tell a lie |
| D．is this the first time you have lied |
We_______on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |