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  3. It is said that most adult second language learners will be lucky to acquire 5, 000 words even after several years of study. 【C1

It is said that most adult second language learners will be lucky to acquire 5, 000 words even after several years of study. 【C1

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问题     It is said that most adult second language learners will be lucky to acquire 5, 000 words even after several years of study. 【C1】______comparison a native speaker can usually have 20, 000 words.
    This relatively slow progress has【C2】______to do with aptitude than with exposure. It has been calculated that a classroom【C3】______would need 18 years of classroom exposure to supply the same amount【C4】______vocabulary input that occurs in just one year of natural settings.
    How many words does a learner【C5】______to know? One figure that【C6】______often quoted is 2000. This is around the number of words that most native speakers use in【C7】______daily conversations. It is also the size of the defining vocabulary used in dictionaries【C8】______language learners.
    In【C9】______, the most frequent 100 words in English make up 50 per cent of most texts. These include grammar- or function - words【C10】______as "has" , "to" , and "did" , but not content words like "answer", "depend " and "large".
【C5】
选项 A、should
B、need
C、must
D、think
答案B
解析
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