单项选择题

When finding it difficult to fall asleep, people would usually rely on ______.

A．sleeping pills
B．counting in bed
C．tossing in bed
D．turning in bed
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单项选择题
How many people could not have a sound sleep at night according to the recent survey
A．70%.
B．54.3%.
C．45.3%.
D．36.5%.
单项选择题
Babies sleep much longer than adults each day because ______.
A．they have nothing else to do day and night
B．they need sleep to help develop brains and bodies
C．adults find it difficult to fall asleep at night
D．adults have quite a lot of things to do during the day
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