单项选择题

案例分析题 The average number of hours of sleep that an adult needs is ______.

A．approximately six hours
B．around ten hours
C．about eight hours
D．not stated here
<上一题 目录 下一题>
热门 试题

单项选择题
A good title for this passage is ______.
A．Sleep
B．Good Health
C．Dreams
D．Work and Rest
单项选择题
During REM, ______.
A．your eyes move quickly
B．you dream
C．you are restless
D．both A and B
相关试题