B. Wolves tend to protect their hunting grounds．

　　C. Wolves sometimes have quarrels after howling together．

　　D. Wolves of low rank are encouraged to join in the chorus．

　　. Researchers are sure that wolves often howl to______．

　　A. show their ranks  

　　B. find their companions

　　C. report the missing ones   

　　  D. express their loneliness

　　. “Howling… is a contagious behaviour”（in the last paragraph）means_______．

　　A. howling is a signal for hunting

　　B. howling is a way of communication

　　C. howling often occurs in the morning

　　D. howling spreads from one to another

　　DCBD

　　解析：文章讲的是狼群发出嚎叫的原因，作用和特点。

　　D 判断推理题。根据第二段It’s almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together.可知。

　　C

　　事实细节题。根据第三段and the next, quarreling among each other.可知。

　　B 事实细节题。 根据第四段What is clear, however, is that howling is often used among packmates to locate each other可知。

　　D 推理判断题。根据Howling, interestingly, is a contagious behavior. When one wolf starts to howl, very likely others will follow.可知，当一只狼嚎叫的时候，别的狼也会跟随一起嚎叫。

【2017届高考英语总复习闯关密训卷 Unit1《Great scientists》必修5】相关文章：

★ 2017届高考英语二轮复习课时训练：18（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修7 unit1《Living well》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修8 unit2《Cloning》

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（3）模块1 《Unit 3 Celebration》（含解析） 北师大版必修1

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (15)

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit1《Festivals around the world》

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (1)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (20)

★ 2016年高考英语复习要做好的六件事

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (42)