Almost every child, on the first day he sets foot in a school building, is smarter, more 【B1】______ , less afraid of what he doesn’t know, better at finding and 【B2】______ things out, more confident, resourceful(机敏的), persistent, and 【B3】 ______ than he will ever be again in his schooling — or, unless he is very 【B4】______ and very lucky, for the rest of his life. Already, by paying close attention to and 【B5】______ with the world and people around him, and without any school-type 【B6】___instruction, he has done a task far more difficult, complicated and 【B7】___ than anything he will be asked to do in school, or than any of his teachers has done for years. He has solved the 【B8】______ of language. He has discovered it. Babies don’t even know that language exists—and 【B9】_________. He has done it by exploring, by experimenting, by developing his own model of the grammar of language, 【B10】_________ until it does work. And while he has been doing this, he has been learning other things as well, 【B11】____________ , and many that are more complicated than the ones they do try to teach him.
【B10】
by trying it out and seeing whether it works by gradually changing it and refining it或:by trying it out and seeing whether it performs well by changing it and perfecting it gradually