2. 外语
  3. Play is the【C1】______business of childhood. From earliest infancy, every child needs opportunity and the right material for play

Play is the【C1】______business of childhood. From earliest infancy, every child needs opportunity and the right material for play

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问题     Play is the【C1】______business of childhood. From earliest infancy, every child needs opportunity and the right material for play, and the main【C2】______of play are toys. Their main function is to suggest, encourage and assist play.【C3】______it is important to choose suitable toys for different【C4】______of a child’s development.
    Research【C5】______infant development has shown the standard a child is likely【C6】______within the【C7】______of his inherited abilities,【C8】______largely determined in the first three years of his life. So a baby’s ability to profit from the right play materials should not be【C9】______A baby who is encouraged and stimulated,【C10】______and shown things and played with, has the best chance of growing up successfully.
    The next stage, from three to five years old, curiosity knows no bounds. Every type of suitable toy should be made available【C11】______the child, for trying out, experimenting and learning, for discovering his own【C12】______ability. Bricks and jigsaws and construction toys; sand and water play; toys for【C13】______and pretending play; social games for learning to play and【C14】______others.
    【C15】______the age of seven or eight, play and work mean【C16】______the same thing to a child. But【C17】______reading has been mastered, then books and school become the main 【C18】______of learning. Toys are still interesting and valuable, they【C19】______new hobbies, but their significance has changed - to a child of nine or ten years, toys and games mean,【C20】______to adults, relaxation and fun.
【C17】
选项 A、once when
B、once
C、when once
D、once if
答案B
解析 语法辨析题。once引导时间状语从句，意为“一旦……”，但有了once就不能再加when。
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