题目内容
19.Most of teenagers spent nearly 3 hoursonaverage a week in surfing the Internet.分析 大多数青少年平均每周花近三个小时的时间上网.
解答 答案是on;本题考查语境中选用适当的词;on average平均; 根据语境,"平均"每周花近三个小时,故答案是on.
点评 单词拼写必须在对语境整体理解的基础上抓住指向答案的关键线索、固定句型或搭配等,同时注意所选词的形式变化.
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