单项选择题
Passage 3 Questions 17 to 20 are based on the passage you have just heard.
A．Polynesian. B．American. C．English. D．Japanese.
A．Forcing. B．Discovering exact details about. C．Pressing. D．Knowing about.
A．To show that they were all left-faced. B．To prove that there are some exceptions to the left-faced rule. C．To let us realize the importance of early childhood education in music. D．To show that their fingers were longer than those of most others.