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".
【C3】

选项 A、learner
B、person
C、worker
D、teacher

答案A

解析
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