单项选择题
A．He has to read a history book. B．He is too busy to go with her. C．He has already visited the museum. D．He must hand in a report about the museum.
A．The arrangement of the Wednesday meeting. B．Where they are going to meet Mr. Johnson. C．The necessity of writing to Mr. Johnson. D．Who is going to contact Mr. Johnson.
A．The effects of music do not last long. B．Piano music could interfere with your reasoning ability. C．Music, whether classical or rock, helps improve your memory. D．The more you listen to music, the higher your test scores will be.