About _______ gene-targeting drugs are already in testing pipeline. It won’t be long ______ they are put into effect.
| A．two dozen; before | B．two dozens; that |
| C．two dozens of; before | D．dozens; that |
To our relief, the European company expressed their ____ to co-operate with us.
| A．anxiety | B．concern |
| C．willingness | D．complaints |
Yesterday, my father was so lost in his thoughts that he didn’t realize he ____ the red lights.
| A．ran | B．was running | C．runs | D．has run |
A bird is known by its song, and a man by his _____.
| A．action | B．friends | C．talk | D．nature |
When I got into the office, I found Mr. Green ____ in his work, without noticing my arrival.
| A．buried | B．burying |
| C．to bury | D．to be buried |
Luo Jiahui, ____ typical Asian American, was elected governor of the State of Washington in 1996, the first to win ____ honor.
| A．a ; an | B．the ; an | C．the ; the | D．a ; the |