_____________ ,they went home,________________.
| A．Their work had been finished; singing and laughing |
| B．They had finished their work; sang and laughed |
| C．Their work finished; singing and laughing |
| D．after their work finished; singing and laughing |
The new secretary is and therefore the manager is satisfied with her work.
| A．effective | B．efficient | C．specific | D．sufficient |
— Hi! John, would you like to play football with us?
— Oh，I can’t. I ___ my lesson all the morning and still need half an hour.
| A．am reviewing | B．have been reviewing |
| C．have reviewed | D．reviewed |
---- Which of these digital cameras do you like best?
---- ______. They are both expensive and of little use.
| A．None | B．Neither | C．Nothing | D．No one |
We work together to achieve our common purpose: ____ world that is safer, cleaner and healthier than ____ one we founded.
| A．the; the | B．a; 不填 | C．a; the | D．the; 不填 |
— Are you pleased with what he has done?
— It couldn’t be____. Why didn’t he put more effort into his work?
| A．any worse | B．much better | C．so bad | D．best |