We()on it for many hours but we have not yet reached any concinsion.
A: work
B: have been worked
C: have been working
D: are working
A: work
B: have been worked
C: have been working
D: are working
举一反三
- We ______ on it for many hours, but we have not yet reached any conclusion. A: are being worked B: are working C: have been working D: have been worked
- 4. We ________ on it for several hours but we have not yet reached any conclusion. A: A. work B: B. are working C: C. have been working D: D. have been worked
- How many men does your uncle _____ for him A: have worked B: have to work C: have working D: have been working
- By the end of next month I ______ here for five years. A: will work B: have been working C: have worked D: will have been working
- We ________ on it for several hours but we have not yet reached any conclusion.