—This returned scholar has become one of the top experts in this field.
—Yes, I know him very well. He ______ for ten years at an institute in the USA.
A. has worked B. had worked C. worked D. has been working
相关试题
As you can see, the number of the students ______rising these days.
| A．keep | B． was keeping |
C．were keeping | D．keeps |
---Is it Jim who is driving the new car?
---Probably. I know he has recently bought a ______ car.
| A．shiny German black | B．black shiny German |
| C．shiny black German | D．black German shiny |
According to the situation, they found three different ______ to the problem.
| A．means | B．approaches | C．ways | D．methods |
---What made the students so upset?
---______ to go to the movie.
| A．Having not been allowed | B．Not having allowed |
| C．Because of not having allowed | D．Not having been allowed |
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