阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。You know how disappointed it can be if you are not able to communicate with the 【小题1】 (native) when you’re traveling, and you might think learning a new language is a tough task.
But fear not! We figured out 【小题2】 (exact) how many words you need to learn to speak a language well. A group of linguists (语言学家) have created a test 【小题3】 (see) how many words you know in English. There are 200,000+ words in the English language, but the test only 【小题4】 (include) 50 of them. You may not understand all of the 50 words. The linguists believe that if you multiply (乘) 【小题5】 number of words out of 50 that you understand by 500, you’ll almost know your English vocabulary.
A professor has found that native speakers of a language know 15,000 to 20,000 lemmas (词目). A lemma 【小题6】 (make) up of a root word (say: walk) and all of 【小题7】 (it) inflections (屈折形式) (walked, walking, walker, etc.). But if you learn a new language, you can never understand 15,000 lemmas.
He discourages people from learning all of the words in a language. There are 800 to 1,000 lemmas 【小题8】 are used most frequently in the language. He advises people to focus 【小题9】 these lemmas. With these lemmas, people can understand 75% of the language. And they will be 【小题10】 (confidence) enough to start a conversation, order at a restaurant, and deal with other daily communication.