Babies sleep l6 to l8 hours in every 24 hours, and they sleep less they grow older.A. whi

发布时间：2020-08-16 14:20:20

Babies sleep l6 to l8 hours in every 24 hours, and they sleep less      they grow older.
A. while
B. as
C. when
D. after

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A. while
(答案→)B. as
C. when
D. after
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