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
A: are being worked
B: are working
C: have been working
D: have been worked
C
举一反三
- 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
- 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
- We ________ on it for several hours but we have not yet reached any conclusion.
- Since I came to this school,I _____as a volunteer. A: have been working B: have be working C: have worked D: have being working
- By the end of July, I _____ in the lab for two years. A: would have been working B: have worked C: will have worked D: will have been working
内容
- 0
I am tired. I ______ all day. A: am working B: have been working C: worked D: have been worked
- 1
How many men does your uncle _____ for him A: have worked B: have to work C: have working D: have been working
- 2
This is the second year that I ______ in this college. A: worked B: have worked C: have been working
- 3
They ______ on the program for almost one week before I joined them. A: had been working B: bad worked C: have been working D: have worked
- 4
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