There  are probably  around 3,000 languages speaking in  the world.

Which of the following would be the best title for the passage?

What is the main idea of the passage?

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

English is a compulsory subject in most of the schools in Vietnam.

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.