Childrenshouldhaveat的精选

问题详情：Childrenshouldhaveatleast ________atnight.A．eight­hourssleep  B．eighthour’ssleepC．eight­hours­sleep D．eighthours’sleep【回答】D点拨：本题用语法判定法解题。以­s结尾的复数名词变所有格时直接...