A. Speeches at world forums can lead to effective solutions to world problems.

B. Speeches from medical authorities can calm people down in times of pandemics.

C. The morale of soldiers before a battle can be boosted by senior officers' speeches.

D. Speeches paying tribute to the dead can comfort the mourners.

83. Public speaking can play all the following roles EXCEPT

A. to convince people in a debate.

B. to inform people at a presentation.

C. to advise people at work.

D. to entertain people at a wedding.

84. According to the passage, which of the following best explains the author's view on “great speaking ability”?

A. It comes from observing rules.

B. It can be perfected with easy effort.

C. It can be acquired from birth.

D. It comes from learning and practice.

85. What is the main idea of the passage?

A. Public speaking in international forums.

B. The many uses of public speaking.

C. Public speaking in daily life context.

D. The rules of public speaking.

TEXT B

Every business needs two things, says Skullcandy CEO Rick Alden: inspiration and desperation. In 2001, Alden had both. He'd sold two snowboarding businesses, and he was desperately bored. But he had an idea: He wanted to make a new kind of headphone.