低年级的学生应能够用自然的声音，按照节奏和曲调有表情地（）。
A.独唱或参与齐唱
B.独唱或参与合唱
C.独唱或参与演奏
参考答案：A
What does the speaker think of the movement to the suburbs().
A.People may miss the cultural life in cities.
B.The movement is still developing.
C.It satisfies man’s need to live and work in an ideal environment.
D.People may like the companionship in suburbs.
由于生产力的发展，在奴隶社会依次出现了私有制、阶级、国家。 ( )
