Sleep problems can seriously affect one’s quality of life. The number of older Americans with sleep problems is not small.

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问题 Sleep problems can seriously affect one’s quality of life.
The number of older Americans with sleep problems is not small.

选项 A、Right
B、Wrong
C、Not mentioned

答案A

解析 短文的第三段说,研究者发现有超过半数的美国老年人有睡眠问题。
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