题目内容
20.Glass didn't becomewidely (wide) used until the 13th century.分析 直到十三世纪,玻璃才变得用途广泛.
解答 根据副词修饰动词的原则,widely 修饰动词used.故答案:widely
点评 本题考查词形的转换.应该注意单词词性的转换,wide形容词;widely副词;副词修饰动词.
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