Imagine a world in which children would be the rulers and could decide not only the outcome of each and every occurrence, but al

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问题     Imagine a world in which children would be the rulers and could decide not
only the outcome of each and every occurrence, but also dictate the very structure
and form of the environment. On this world, a child’s wildest thoughts would          【S1】______.
become reality, limited only to the extent of his or her imagination. While such a    【S2】______.
world might sound both fantastic and frightening, at least from a logical, adult
perspective, it does not exist. What’s mere, it has been in existence for some        【S3】______.
time and is populated by hundred of thousands of children who                         【S4】______.
cost hours within its boundaries experimenting and learning. This world is not        【S5】______.
real, at least not in the traditional sense, nor exists within a computer and is      【S6】______.
generated by an educational programming language called LOGO. Like other              【S7】______.
computer languages and programs that are designed to test children and provide
applications that formal dispense information, LOGO allows children, even             【S8】______.
preschool children, be in total Control Children teach the computer to think and      【S9】______.
as a result develop and sharpen its own reasoning abilities.                          【S10】______.
【S2】

选项

答案to the extent→by the extent

解析 to the extent是固定搭配,意为“达到…程度”,而文中的limited是被动语态的谓语动词,原意为“受到儿童想像力程度的限制”,故用by。
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