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职称英语
卫生类C级
[单选题]
Research [indicates]that over 81% of teachers are dissatisfied with their salary.
A.shows
B.dictates
C.proves
D.discovers
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![Research [indicates]that over 81% of teachers are dissatisfied with their salary.](https://img.zhaotiba.com/tiku75/15021499.jpg "Research [indicates]that over 81% of teachers are dissatisfied with their salary.")