英语填空youmustmakesurethatyougetenoughsleepmuchworkyouhavetodoa,whateverb,wheneverc,howeverdwhichever有答A的有答C的我也疑惑这两个呢

Question

英语填空
you must make sure that you get enough sleep _much work you have to do
a,whatever b,whenever c,however d whichever
有答A的有答C的 我也疑惑这两个呢

Answer 1

我也疑惑了 你abc选项后面都有一个逗号 为什么d选项没有 是题目这样还是你打错了.
我觉得选a吧 .however 表转折的 这句话明显没得转折关系.
另外,分析的时候想想中文转折词“但是”,你自己说话的时候肯定也只想强调“但是”后面的内容噻.而本题中明显是想强调“you must make sure that you get enough sleep” ,故选a