（1）Last year the Foundation reported that nearly 60% of the 7- to 12-year-olds said they felt

during the day.
（2）How much sleep you need depends on （取决于） your

.
（3）Adults need about

hours of sleep every day.
（4）Sleepiness being such a

for teenagers.
（5）Students，parents and teachers are pleased （满意的） with the

.