【单选题】
Q4: Why does the ski patrol use explosives?___
A. To dig holes in the snow .
B. To close the area for skiing .
C. To make an avalanche move on purpose .
D. To' check how different layers are holding up .
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答案
C
解析
暂无解析
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Q2: According to Rubin, what can small companies do to thank holiday workers?___
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