国家开放大学 / 综合英语（2）
4. In which of the following paragraph(s) does the author tell us what to say to encourage children in a science discussion?
a.The second and third.
b.The fourth and fifth.
c.The fifth and sixth.
d.The seventh.
a.The second and third.
b.The fourth and fifth.
c.The fifth and sixth.
d.The seventh.
参考答案：
佳题速递：