The author mentions the eruption of Mount St. Helens （lines 25 -26) primarily in order to

A.To give an example of the various reasons for road accidents. B.To show how important it is for drivers to be emotionally healthy. C.To show some of the inaccurate estimations by researchers. D.To illustrate the hidden tensions in the course of driving.

A.To describe some unusual kinds of pets． B.To measure distances trailed by various animals． C.To compare their home-finding abilities with those of homing pigeons． D.To interest the reader in learning about other animals．

A．To indicate that watching news is common in the evening. B．To explain America's cultural invasion of France. C．To give an example of the acceptance of American culture. D．To show that France has submitted to America.

A．Indo-European languages were slow to spread in Old Europe B．the inhabitants of Old Europe were not able to prevent Indo-European incursions C．the use of the Old European script. declined D．the Old European culture survived for a time after the Indo-European incursions

A．To demonstrate how the westward expansion of the United States came about. B．To illustrate Washington's contribution to the evolution of the United States. C．To explain why Jefferson was chosen to be one of the presidents on Mount Rushmore. D．To show why Jefferson's inclusion on Mount Rushmore was a contentious issu

A．To warn about possible risks involved in phytoremediation B．To help illustrate the potential of phytoremediation C．To show that hyperaccumulating plants grow in many regions of the world D．To explain how zinc contamination can be reduced

A．their mastery of writing novels B．her admiration for them C．they had different writing styles to reveal the world D．her understanding about their works

A．An increase in technology. B．The growing complexity of the child's psychological needs. C．A decrease in the child's intellectual capacities. D．The growing number of single parent families.

A．the English King B．the French King C．the German King D．none of the Kings mentioned in A, B and C

A．his awareness of profundity. B．his contrastive impulses. C．his tendency to compromise. D．his nonconformist image.

A．To give examples of modern groups in which women participate in net hunting B．To demonstrate how net hunting should be carried out in modern societies C．To describe net hunting techniques that protect the women in the group D．To contrast their net hunting techniques with those of the people in the Congo

A．a well-known metalwork plant B．the first plant of its kind in Philadelphia C．typical of the large factories that were becoming more common D．typical of factories that consisted of a single building

A．Because they are the origin of the myxoma virus B．Because they carry the myxoma virus to other animals C．Because they die when they are infected by myxoma D．Because they have an immunity to the myxoma virus

A．Some are not very good. B．It is unusual to see such paintings. C．Many were drawn by children. D．The artists were mostly right-hande

A．approving B．favorable C．dissenting D．objective

A．fairy stories are still being made up B．there is confusion about different kinds of truth C．people try to modernise old fairy stories D．there is more concern for children's fears nowadays

A．clear the misunderstanding of its meaning and its coverage B．state that people tends to "like the new and hate the old" C．manifest the fact people don"t record things about rubbish by sarcasm D．prove that ignorance can lead to terror and inaction

A．The boredom and frustration brought by unemployment. B．The poorness of living space and housing shortage. C．The stress and depression produced by sleeplessness. D．The worry about financial and economic situation.