A-A+
Although we are not sure why we sleep there i
问题详情
Although we are not sure why we sleep, there is no doubt ______ we need to do so.
A．whether
B．why
C．what
D．that请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：尽管我们不确定睡觉的原因，但毫无疑问我们需要这样做。Thereisnodoubtthat…为固定句型，意为“毫无疑问……”。
