How many words one uses cannot be measured (测量)exactly. However, Professor Seashore concluded the first- graders entered school with at least 24,000 words and add 5,000 each year so that they leave high school with at least 80,000. These figures( 数字) are for recognition vocabulary （词汇），the words we understand when we read or hear them, which are more than our active( 活跃的) vocabulary, the words we use in speaking and writing.
Using the words you recognize in reading will help get them into your active vocabulary. In your reading, pay attention to these words, especially when the subject is one that you might well write or talk about. Underline （draw a line under） or make a list of words that you feel a need for and look up the ones that you are not sure of in a dictionary. And then before very long you will find a way to use some of them. Once you know how they are pronounced and what they mean, you can safely use them.
1. How many words does one use?
A. Nobody can answer the question.
B. No one knows for sure but Professor Seashore.
C .Not everyone can tell the exact number.
D. People cannot give an exact answer, not even Prof. Seashore.
2. Prof. Seashore concluded that it takes a first –grader _____ years to increase his vocabulary from 24,000 to 80,000.
A.12 B. 10 C. 8 D.5
3. According to Prof. Seashore, ______.
A. one has at least 80,000 recognition words
B. recognition words can become active ones
C. one’s recognition vocabulary includes active words and non—active ones
D. one’s active words grow with his recognition ones
4. One way suggested by the writer to increase our active vocabulary is that we should ____.
A. look up a dictionary for more new words and keep them in our note
B. read and recognize the words we will need and add them into our list of active vocabulary
C. keep well in touch with more recognition words and keep using them after knowing their pronunciation and meaning.
D. read more , write more and use more
5. According to the passage, an important step(步骤) leading to the correct use of vocabulary is ______.
A. extending (扩大) the list of the active words
B. often looking up a dictionary for necessary words
C. knowing your subject well
D. knowing the correct pronunciation and meaning of the words to be used