Mr. Smith is the only one of those foreigners who ____ in China now.
A: worked
B: is working
C: are working
D: have been working
A: worked
B: is working
C: are working
D: have been working
举一反三
- Mr. Smith is one of the foreign experts who ________ in China. A: works B: is working C: are working D: has been working
- 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
- For some time now, Eric ______ for foreign trade. A: had been working B: was working C: has been working D: worked
- I am tired. I ______ all day. A: am working B: have been working C: worked D: have been worked
- 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