单项选择题
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.
A.He went to see his schoolmate. B.He went to see a film with his friend. C.He watched television with his friend. D.He stayed at home talking with his friend.