Passage2
1.Behavior problems of dogs are believed to be just part of their nature.
2.The primary purpose of obedience training is to make the dog aware of its owner’s authority.
3.Effective communication between a dog and its owner is the foundation for dogs to perform tasks.
4.Why do pet dogs love performing tricks for their masters? To show their willingness to obey.
5.When a dog has received effective obedience training, its owner can give the dog more freedom.
Passage3
1.The first paragraph tells us the author was interested in flowers and insects in his childhood .
2.The author can’t remember his relatives clearly because he was fully occupied with observing nature.
3.It can be inferred from the passage that the author was no more than a born naturalist.
4.The author says that he is a naturalist rather than a scientist probably because he thinks he lacks some of the qualities required of a scientist.
5.According to the author, a born naturalist should first of all be full of enthusiasm.
Passage4
1.Scientists are puzzled by the guyots’ curiously flat tops.
2.Most of the guyots are located in the Pacific Ocean.
3.Guyots were probably formed by under water lava spouts.
4.The discovery of shallow-water fossils indicates that the guyots were once much nearer the surface of the ocean.
5.The guyots are still a geographic puzzle because theories related to shapes have never been proved.
Passage5
1.Honey was highly valued by the ancients because it helped people keep healthy.
2.The ancients believed in the following qualities of honey except killing germs of some diseases.
3.By saying“Its production has defied analysis”(Para.2), the author means no one knows how bees produce honey.
4.Honey is better than other types of sugar because it is easy for the body to absorb.
5.The selection is mainly about honey’s values and advantages.
Passage6
1. The author felt terrified when he saw the king cobra in the grass.
2. When shells from the enemy’s guns were exploding around the snake, it moved toward a big rock.
3. The patrol was sent out to gather intelligence about the enemy.
4. It may be inferred from the passage that the scouts must have been found by the enemy.
5. The phrase“started‘home’”(Para.4) probably means began to return to the place where our troops were stationed.

2
1.人们认为狗的行为问题只是它们天性的一部分。
2.顺从训练的主要目的就是要让狗意识到主人的权威。
3.狗和主人间有效的沟通是让狗执行任务的基础。
4.为什么宠物狗喜欢表演杂耍给主人看呢？是为了展示它们很听话。
5. 当狗接受了有效的顺从训练后，主人该给它更多的自由。


3
1.第一段告诉我们作者儿时对花和昆虫感兴趣。
2.作者不能很清楚地记得他的亲戚，因为大部分时间他都在观察自然。
3.可以从文章中推断出作者只是个天生的自然学家。
4.作者说他是个自然学家而不是个科学家，因为他认为他缺少科学家所需具备的一些品质。
5.根据作者所言，一个天生的自然学家首先应该充满了热情和激情。


4
1.科学家对平顶海山的奇怪平坦顶部感到迷惑。
2.大部分的平顶海山位于太平洋。
3.平顶海山大概形成于水下熔岩喷发。
4.浅水化石的发现显示平顶海山曾经离海洋表面更近一些。
5.因为与其形状形成相关的理论还未得到证实，所以平顶海山仍然是个地质学的谜团。


5
1.古人对蜂蜜的评价很高，因为它能帮助人们保持健康。
2.古人相信蜂蜜具有以下特性，但不包括杀死疾病的病菌的能力。
3.作者通过在第二段中提到“它的生产制造已经证明与分析不符。”来表达“没人知晓蜜蜂是如何制造蜂蜜”这一意思。
4.蜂蜜比其他种类的糖更好，因为它易于为身体所吸收。
5.这篇节选主要是关于蜂蜜的价值及优点。


6
1. 当作者看到草丛中的眼镜蛇他感到恐慌。
2. 当从敌人枪里射出的子弹在蛇的周围爆炸开来，它就向大石头滑去。
3. 侦察队被派出去收集敌人的情报。
4. 可以从文中推断出侦查员一定已经被敌人找到。
5. 第四段中的词组“started home”(开始回家)大概是指开始返回我们部队驻扎的地点。