The light will be thrown ______ the cause of cancer by research that is now in progress.
| A．to | B．upon | C．in | D．for |
相关试题
______ made the school proud was ______ more that 90% of the students had been admitted to key universities.
| A．What…because | B．What…that | C．That…what | D．That…because |
There is a new problem involved in the popularity of private cars _______ road conditions need _______.
| A．that; to be improved | B．which; to be improved | C．where; improving | D．when; improving |
It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
| A．that | B．when | C．what | D．how |
____is certain is ___prevention is more important than treatment .
A．It;that  |
B．What;that | C．As;what | D．What;what |
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