If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a me...
2023-01-17 04:36:07 54次 2010-2011学年福建省高三上学期第二次月考英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
If you feel tired and sick of fat foods, that is
___________ you have to go to the hospital for a medical examination．
A．why
B．what C．when
D．whether
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