I am tired. I ______ all day.
A: am working
B: have been working
C: worked
D: have been worked
A: am working
B: have been working
C: worked
D: have been worked
举一反三
- I'm tired out. I all afternoon and I don't seem to have finished anything. A: worked B: have worked C: had worked D: have been working
- By the end of next month I<br/>____ here for 20 years exactly. A: have worked B: am going to work C: am working D: shall have been 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
- This is the second year that I ______ in this college. A: worked B: have worked C: have been working
- 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