19. The designer, with whom I have been working since 1999, has played a key role ___ shaping my views of the work.
举一反三
- 中国大学MOOC:"Since I have been ill, my appetite has diminished.";
- 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
- _____________ has played a key role in promoting democratic values and principles.
- By the end of next month I ______ here for 20 years exactly. A: have been working B: shall have been working C: would have been working D: has 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