I’m fine — I just felt a bit sleepy and tired, that was I went to bed so early.A. because

发布时间：2020-08-16 17:16:20

I’m fine — I just felt a bit sleepy and tired, that was      I went to bed so early.
A. because
B. when
C. that
D. why

网友回答

A. because
B. when
C. that
(答案→)D. why
解析：考察表语从句.句意,我很好——我只感到有点困和累，那是为什么我这么早睡觉的原因。可知前文为下文的原因，故选D。
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