阅读理解。 Students who say they never or hardly ever used dictionaries often speak English well but usually write poorly, because they make many mistakes. The students who use dictionaries most do not learn especially well either. The ones who look up every new word do not read fast. Therefore they do not have time to read much. Those who use small two-language dictionaries have the worst problems. Their dictionaries often give only one or two words as translations of English. But one English word often has many translations in a foreign language and one foreign word has many translations in English. The most successful students are those who use large college edition dictionaries with about 100,000 words but do not use them too often. When they are reading, these students first try to get the general idea and understand new words from the context (上下文). Then they read again and use the dictionary to look up only key words that they still do not understand. They use dictionaries more for writing. If they are not sure how to spell a word, or divide it into syllables (音节), they always use a dictionary. Also, if they think a noun might have an unusual plural form, they check these in a dictionary. 1. The writer thinks that _____. [     ] A. choose a good dictionary, and you'll be successful in learning English B. dictionaries are not necessary to the students who learn English C. it is very important for students to use good dictionaries properly D. using dictionaries very often can't help to improve writing 2. When does the writer advise students to use a good dictionary in the reading? [     ] A. After the first reading B. At the end of the reading C. During the first reading D. At the beginning of the reading 3. This passage mainly tells us _____. [     ] A. that students shouldn't use small two-language dictionaries B. that the small two-language dictionaries are very useful C. why students should use large college edition dictionaries D. what dictionary students should choose and how to use it 4. Which is not mentioned in this passage? [     ] A. How to make good use of a dictionary. B. How to improve spoken English. C. When to use a dictionary. D. How to practise reading fast.