While other scientists are keeping__ __eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in __ __humans.
| A．a , / | B．an, / | C．the, an | D．an, the |
相关试题
To develop the New Economy, we must not only update our economy with advanced science and technology, but also, ________ this new trend of development.
| A．in addition to | B．in response to | C．in contrast to | D．in relation to |
The people began to break the windows, but the police soon had the situation ________.
| A．under way | B．under control |
| C．under review | D．under consideration |
As is often pointed out, knowled
ge is a two-edged weapon which can be used ________ for good or evil.
| A．similarly | B．widely | C．equally | D．properly |
There are signs that there is a growing tendency for people to turn away from ________ western medicine to alternative methods of treatment.
| A．conventional | B．pessimistic | C．bureaucratic | D．theoretical |
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