They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
| A．had been working; are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
高二英语单项填空困难题
They _____ on the program for almost one week before I joined them, and now, we ____on it as no good results have come out so far.
A．had been working; are still working
B．had worked; were still working
C．have been working; have worked
D．have worked; are still working
高二英语单项填空中等难度题查看答案及解析
They __________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.
A. had been working; are still working
B. had worked; were still working
C. have been working; have worked
D. have worked; are still working
高二英语单项填空中等难度题查看答案及解析
They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
| A．had been working; are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
高二英语单项填空困难题查看答案及解析
They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.
A. had been working; are still working B. had worked; were still working
C. have been working; have worked D. have worked; are still working
高二英语单项填空简单题查看答案及解析
They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.
A. had been working: are still working
B.had worked; were still working
C.have been working; have worked
D.have worked; are still working
高二英语单项填空中等难度题查看答案及解析
They ______ on the project for almost one month before I joined them, and now we ______ on it as no good results have come out so far.
A. had been working; are still working
B. had worked; were still working
C. have been working; have worked
D. have worked; are still working
高二英语单项填空中等难度题查看答案及解析
_____________ the program, they have to stay there for another two weeks.
A. Not completing B. Not completed
C. Not having completed D. Having not completed
高二英语单项填空中等难度题查看答案及解析
Scientists ____ thousands of chemicals before they decided on the right one in the end.
| A．tried out | B．found out | C．worked out | D．turned out |
高二英语单项填空中等难度题查看答案及解析
Scientists ______ thousands of chemicals before they decided on the right one in the end.
A. tried out B. found out
C. worked out D. turned out
高二英语单项填空中等难度题查看答案及解析
The workers in Australian Air Line had been on strike for two weeks. At last they had their pay _______.
A. raised B. raising C. risen D. rising
高二英语单项填空中等难度题查看答案及解析