根据下面内容，回答下列各题： A This classic cross-culture book provides reading passages, c

ulture notes, and discussion topics which focus on values, behaviours, attitudes and communication styles. It features a chapter on cultural diversity in the U. S. , an explanation of mainstream U. S. values with examples which reveal some of the more hidden aspects of culture, examples of cross-cultural differences in a wide variety of cultures, and extensive readings and exercises. B As a multistand course--organized according to functions, discussion techniques and communication concepts--this text develops the speaking skills of business professionals or business students. It is easily adaptable to differing class sizes, student needs and interests. A special feature of the course is its carefully staged discussion activities which structure and facilitate group partici- pation. C This series is intended for students now ready to approach English literature. Each book deals with both the literary and the language aspects of their texts. Some exercises focus on a personal response, others on discussing literary qualities such as style, character, imagery and ideas. Other exercises concentrate on the development of language awareness in terms of grammar, vocabulary and different styles of writing. D Authentic texts covering a wide range of topics provide a stimulating basis for an approach of skills and strategies to academic reading. Techniques of skimming and scanning, identifying main ideas, understanding text organization and guessing unknown vocabulary provide the basis for each unit. These are followed by more advanced strategies, such as analyzing a writers use of time, evaluating a writers attitude and assessing the degree of certainty in arguments. Each unit ends with discussion topics which lead to a writing task based on the reading texts. It aims to train the students to become sensitive to different styles of writing.