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单选题
2.Traditional activities like sit-ups are great for strengthening the body, you do them properly.
A
A. since
B
B.unless
C
C.providing
D
D. considering
答案解析
正确答案：C
解析：
2.【翻译】像仰卧起坐这样传统的活动对于增强体魄来说很好，如果你正确做的话一【精析】 C since:自以来，因为，既然，引导时间和原因状语从句；unless :除非，如果不，引导条件状语从句；providing :如果，在条件下，引导条件状语从句;considering:考虑到，鉴于°根据句意可知，选C ：
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