According to the National Sleep Organization, how long should adults sleep a night? The sleep problems many Japanese were found

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问题 According to the National Sleep Organization, how long should adults sleep a night?
The sleep problems many Japanese were found having, do NOT include ______.

选项 A、having difficulty falling asleep
B、waking many times during the night
C、snoring
D、dozing

答案D

解析 根据第三段第一句和第二句“…were found having a sleep problem,mostly snoring. Other sleep problems include having difficulty falling asleep,waking many times during the night and waking up too early.”可以得知:睡眠问题有snoring,having difficulty falling asleep,waking many times during the night and waking up too early,而不包括 dozing。故答案为D。
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