5.All the materials collected for the research project on pollution are ___________ to all the seniors at this college. A. explored B. available C. registered D. exchanged

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5.All the materials collected for the research project on pollution are ___________ to all the seniors at this college.
A. explored B. available C. registered D. exchanged

参考答案

随机试卷

河北建筑工程学院市场营销学