A.the volunteers do B.because she does not have a weight problem C.because the life there can be very boring D.make

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问题     A.the volunteers do
    B.because she does not have a weight problem
    C.because the life there can be very boring
    D.make people overeat
    E.because she was her own boss
    F.after passing a high-protein test
Volunteers have to get prepared for the time in the calorimeter______.

选项

答案C

解析 此句问的是为什么志愿者要对在实验室里的时间做好准备,文章也提到了做实验时是很枯燥的,如果接受实验,就要做好如何打发时间的心理准备,选项C补到句子中意思合适。故故选C。
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