The boy was curious about how the waste paper was        into a model kite.
A．improvedB．unitedC．transformedD．mixed
C
A提高B聯(lián)合，團結(jié)，結(jié)合C改變，轉(zhuǎn)變，變化D混合。句意;男孩很好奇廢紙是怎樣變成風(fēng)箏模型的。故選C。Transform...into把。。。轉(zhuǎn)變成。。。
點評：解答此類題型一定要掌握各個選項的基本詞義，以及一些固定搭配
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