单项选择题
A．She sat back and relaxed. B．She worked out a new English program. C．She decided to retire. D．She entered university.
A．How to improve your reasoning ability. B．Why classical music is popular with math students. C．The difference between classical music and rock music. D．The effects of music on the results of math tests.
A．The paperback edition is on sale. B．Both editions are the same price now. C．It has two editions with the same cover. D．The hardcover edition is more expensive.