词汇活记活用大学英语四级
　　完型填空练习
:　　Doyouwake
upevery
dayfeeling
tootired,
oreven
upset?
Ifso,then
anewalarm
clock
could
bejust
foryou.
　　Theclock,
called
SleepSmart,
measures
your
sleep
cycle,
andwaits
__1__
youtobeinyour
lightest
phase
ofsleep
__2__
rousing
you.
Itsmakers
saythat
should
__3__
youwake
upfeeling
refreshed
every
morning.
　　Asyousleep
youpass
__4__
asequence
ofsleep
states—light
sleep,
deep
sleep
andREM(rapid
eyemovement)
sleep—that
__5__
approximately
every
90minutes.
Thepoint
inthat
cyc ...