【单选题】

What is WorldEnglish

WorldEnglish is a course in theEnglish language. It is intended for students whose native lauguage is notEnglish. It is a basic programme consisting of six stages.Each stage includes a StudentBook, a Teacher’sBook, a Workbook, and cassette recordings. WorldEnglish is further supported by separate books of readings, by tests, and by visual (可视的) aids.
Who is WorldEnglish for
WorldEnglish may be entered at any one of three different levels. The First Level,Books One and Two, is intended for students with little or no education inEnglish.Books Three and Four make up the Second Level; they are suitable for students who have some knowledge ofEnglish. The Third Level,Books Five and Six, is intended for students who are concerned with improvement in the language.
What does WorldEnglish teach
WorldEnglish teaches four basic skills of language: listening, speaking, reading, and writing.At all levels, each skill is presented systematically. In the First Level, listening and speaking receive more attention. In the latter books, reading and writing become more important. However, reading and writing activities are presented even in Unit One ofBook One; and listening and speaking exercises occur through Unit Ten ofBook Six.
This passage is probably taken from the ______ of anEnglish text book.A．contents
B．introduction
C．first chapter
D．index (索引)