Concerning textbooks, choose which one of the following sent...

An ideal textbook should provide learners with knowledge, language skills and information about English speaking countries, preparing them to interact with people from foreign countries of different backgrounds.

A good textbook does all the tough and tedious job a teacher would normally do in terms of lesson planning or designing specific extra teaching materials.

Top quality textbooks have to be written and designed by native-speaker teachers and published in English-speaking countries.

No effective or successful class can be taught without a textbook which is the only source of practical and firm guidance to the teacher.

Cultural bias found in books published abroad pose a minor problem and teachers should not turn their attention to ideological issues but to focus exclusively on more pressing problems of language.