Complete the passage with the proper words in the box. Each word can only be used once. One word is not needed.

A. understanding     B. industry       C. range      D. improve     E. adopted F. pronounce          G. flooding       H. valued     I. operating       J. tend

 
The speeches of US President Barack Obama have become the favorite way for Japanese to study the English language. Japanese publishers have been ______ the market with over a dozen language-learning titles. Companies are trying to enter a foreign-language teaching _______ which was _______ at $8.6 billion in 2008 by some research institutes.
Why is there such a huge Japanese market for recordings and books of Obama's speeches? Japanese say that listening to Obama speak is a good way to ______ their English-speaking skills.  
Most Japanese, including those studying English, would have difficulty ___ a speech given by a native English speaker. But “Obama's English is easy to understand because he can _______ words clearly and speaks at a relatively slow speed,” said Professor Tadaharu Nikaido, a communication specialist. “Movies ______ to be the most difficult for Japanese, especially when actors mumble (咕哝) their words.” Obama sets his _______ of vocabulary wide enough to accommodate (迎合) all levels of English speakers, Nikaido added, and at the lower end, it sometimes comes within the range of non-native speakers' comprehension.
The Obama speech phenomenon has given way to more books and magazines that focus on how Obama's communication skills might be ______ in Japan for business and political purposes. At least half a dozen books and magazine covers of this kind have appeared in the past several months in Japan.