---When did Kate’s grandma die?
---While the doctors______ on her.
| A．are operating | B．were operating | C．operate | D．operated |
I was told that there were about 50 foreign students ________ Chinese in the school, most ________ were from Germany.
| A．study; of whom | B．study; of them |
| C．studying; of them | D．studying; of whom |
----Is that the small town you often refer to?
----Right, just the one ______ you know I used to work for years.
| A．which | B．where | C．that | D．what |
_______ you sit in front of the computer all day while working, you’d better take exercise for at least an hour every day.
| A．Even if | B．Even though | C．Now that | D．As if |
Our company is searching for a designer, especially ______ with creativity(创造力).
| A．the one | B．that | C．one | D．those |
In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.
| A．mixed up | B．cleaned up | C．turned up | D．stayed up |