2018年12月15日雅思听力小范围预测：Section Four

　　Section Four

　　场景：Lecture

　　题型：填空10

　　内容概述: 研究elephant

　　填空10：

　　31. dates of births and mothers

　　32. many layers

　　33. Cooperate: two elephants use rope to find food

　　34. lack of rain

　　35. how they work change

　　36. weight is high

　　37. emotion bones when dead

　　38. older female aware of danger

　　39. difficult to study in wild

　　40. how sensitive one to another