【正确答案】Extensive reading is crucial (critical) to the mastery of English, but its importance has been neglected. Unlike intensive reading courses opened (offered) at college, extensive reading is intended to (aims to) enlarge students' vocabulary, familiarize them with the different usage of words and eventually improve their comprehension. Extensive reading involves some methods that can enhance the accuracy and efficiency with which you use English at work. Believe in what you read rather than grammar books.