3. Younger people in America seldom complain of sleep disorders.
A. Right B.Wrong C. Notmentioned
4. The number of older Americans with sleep problems is not small.
A. Right B.Wrong C. Notmentioned
5“Sleep fragmentation” refers to a marked lack of “REM” sleep.
A. Right B.Wrong C. Notmentioned
6. The causes of sleep problems in older people remain unidentified.
A. Right B.Wrong C. Notmentioned
7. Actions will soon be taken in America to better help people with sleep problems.
A. Right B.Wrong C. Notmentioned