—You seem familiar with Mr. John?—Of course, we________ together for three years in the 1990s.have worked B. had worked C. are working D. worked
9.The rapid development of communications technology is transforming the ________ in which people communicate across time and space.
8.The ________ goal of the book is to help bridge the gap between research and teaching, particularly the gap between researchers and teachers.
7.The university has launched a research center to develop new ways of ________ bacteria which have become resistant to drug treatments.
6.Computer technology will ________ a revolution in business administration.
5.All their attempts to ________ the child from the burning building were in vain.