Communicative English

What is the purpose of introducing 'Communicative English' in the educational institutions? The learners can learn the English language easily using dialogue. In the light of it, it can be said that the English books of different classes, especially for the classes at secondary level, prescribed by the National Curriculum & Textbook Board should be written in a simple language as well as simple sentences. I would like to highlight the book of classes 9 -10 (English First Paper) only. There are many long sentences in this book, which are really very difficult for the students to learn. Some topics of the book where these sentences are found are mentioned here. Such as The Voice of Women (Unit-18, Lesson-2), A Letter From Nottingham (Unit-9, Lesson-3), The International Mother Language Day (Unit-18, Lesson-3) etc. On the other hand, there are also many mistakes in this book. Correction of the mistakes is a must and the sentences should be shorter. Moreover, there are 100 marks for English first paper in the SSC exams every year and the students are to answer the questions on the basis of that marks. But it is a matter of regret that all the questions are not set up on the basis of that subject only. Some questions like rearranging of sentences, Substitution Table, Vocabulary Test etc. are taken in the question paper from other books, though the first one is taken from the textbook at times.
On the contrary, all the questions are taken from the textbook at the time of setting questions in the question paper of Bengali first paper even in the exams of schools.