People who suffer from excessive drowsiness during the daytime may be victimes of a condition known as "narcolepsy". While most people may feel sleepy while watching TV or after eating a meal, narcoleptics may fall asleep at unusual or embarrassing times. They may doze while eating, talking, taking a shower, or even driving a car. Victims can be affected in one of two ways. Most narcoleptics have several sleeping spells during each day with alert periods in between. A minority of others feel drowsy almost all the time and are alert for only brief intervals.

      There are no reliable data showing how many people have narcolepsy. Some estimates put the number as high as 300,000 in the United States alone. The cause of this illness has not been identified, although recent research suggests that the problem may stem from an immune system reacting abnormally to the brain's chemical processes. There is currently no cure for narcolepsy, so sufferers of this condition can only have their symptoms treated through a combination of counseling and drugs.

Narcolepsy is a condition in which people

People who suffer from excessive drowsiness during the daytime may be victimes of a condition known as "narcolepsy". While most people may feel sleepy while watching TV or fater eating a meal, narcoleptics may fall asleep at unusual or embarrassing times. They may doze while eating, talking, taking a shower, or even driving a car. Victims can be affected in one of two ways. Most narcoleptics have several sleeping spells during each day with alert periods in between. A minority of others feel drowsy almost all the time and are alert for only brief intervals.

The word "others" at the end of the paragraph refers to

      People who suffer from excessive drowsiness during the daytime may be victimes of a condition known as "narcolepsy". While most people may feel sleepy while watching TV or after eating a meal, narcoleptics may fall asleep at unusual or embarrassing times. They may doze while eating, talking, taking a shower, or even driving a car. Victims can be affected in one of two ways. Most narcoleptics have several sleeping spells during each day with alert periods in between. A minority of others feel drowsy almost all the time and are alert for only brief intervals.

      There are no reliable data showing how many people have narcolepsy. Some estimates put the number as high as 300,000 in the United States alone. The cause of this illness has not been identified, although recent research suggests that the problem may stem from an immune system reacting abnormally to the brain's chemical processes. There is currently no cure for narcolepsy, so sufferers of this condition can only have their symptoms treated through a combination of counseling and drugs.

What is the main topic of this passage?

         A few scientists are dedicated to researching mysterious unclassified beasts which other scientists refuse to believe exist. While these cryptozoologists keep an open mind about their object of study, they are quick to point to cases in which the skeptics were proved mistaken. For example, the pygmy hippopotamus, once claimed to be extinct, was found to exist in East Africa. The giant squid was dismissed as the product of an overactive imagination until a specimen was washed up on a beach in 1873.

     One of the most intriguing mysteries being investigated by cryptozoologists is "Bigfoot," a large hairy humanoid creature which many people claim to have seen in parts of North America. In 1967, a film of Bigfoot was actually taken by an amateur photographer. Some scientists are convinced of Bigfoot's existence, while others argue that Bigfoot is just an elaborate hoax.

     The Loch Ness monster provokes similar disagreements among researchers. In this case some scientists argue that while some creature may have been seen, it is probably a type of whale which penetrates the loch when the Ness River floods.

     The Yeti of the Himalayas may be the most fascinating undiscovered creature. Many climbers claim to have seen the Yeti or its footprints, and local inhabitants of the mountains are convinced of its existence. Such well-known mysteries as the Yeti and less well-known mysteries as the Congo dinosaur and the Queensland tiger will no doubt be the source of much speculation for years to come.

Which of the following statements is NOT true of unclassified beasts?

          A few scientists are dedicated to researching mysterious

10     One of the most intriguing mysteries being investigated

     The Loch Ness monster provokes similar disagreements

     The Yeti of the Himalayas may be the most fascinating

     One of the most intriguing mysteries being investigated by cryptozoologists is "Bigfoot," a large hairy humanoid creature which many people claim to have seen in parts of North America. In 1967, a film of Bigfoot was actually taken by an amateur photographer. Some scientists are convinced of Bigfoot's existence, while others argue that Bigfoot is just an elaborate hoax.

The word "hoax" in the second paragraph is closest in meaning to

     One of the most intriguing mysteries being investigated by cryptozoologists is "Bigfoot," a large hairy humanoid creature which many people claim to have seen in parts of North America. In 1967, a film of Bigfoot was actually taken by an amateur photographer. Some scientists are convinced of Bigfoot's existence, while others argue that Bigfoot is just an elaborate hoax.

The word "intriguing" in the first paragraph is closest in meaning to

     The Yeti of the Himalayas may be the most fascinating undiscovered creature. Many climbers claim to have seen the Yeti or its footprints, and local inhabitants of the mountains are convinced of its existence. Such well-known mysteries as the Yeti and less well-known mysteries as the Congo dinosaur and the Queensland tiger will no doubt be the source of much speculation for years to come.

The word "speculation" in the last paragraph is closest in meaning to

A few scientists are dedicated to researching mysterious unclassified beasts which other scientists refuse to believe exist. While these cryptozoologists keep an open mind about their object of study, they are quick to point to cases in which the skeptics were proved mistaken. For example, the pygmy hippopotamus, once claimed to be extinct, was found to exist in East Africa. The giant squid was dismissed as the product of an overactive imagination until a specimen was washed up on a beach in 1873.

     One of the most intriguing mysteries being investigated by cryptozoologists is "Bigfoot," a large hairy humanoid creature which many people claim to have seen in parts of North America. In 1967, a film of Bigfoot was actually taken by an amateur photographer. Some scientists are convinced of Bigfoot's existence, while others argue that Bigfoot is just an elaborate hoax.

     The Loch Ness monster provokes similar disagreements among researchers. In this case some scientists argue that while some creature may have been seen, it is probably a type of whale which penetrates the loch when the Ness River floods.

     The Yeti of the Himalayas may be the most fascinating undiscovered creature. Many climbers claim to have seen the Yeti or its footprints, and local inhabitants of the mountains are convinced of its existence. Such well-known mysteries as the Yeti and less well-known mysteries as the Congo dinosaur and the Queensland tiger will no doubt be the source of much speculation for years to come.

According to the passage, the existence of the Yeti is

     The Loch Ness monster provokes similar disagreements among researchers. In this case some scientists argue that while some creature may have been seen, it is probably a type of whale which penetrates the loch when the Ness River floods.

The word "penetrates" in the third paragraph is closest in meaning to