单选题
Rebecca found life on Everest is hard because ______.
A、
she has nothing but a toothbrush
B、
she is a clean person
C、
everything that is needed has to be carried on the back
【正确答案】
C
【答案解析】
[解析] 题干的关键词是“hard”，在第二段第二行可看到，后面引号中的原话即是答案。
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