▶ Phrase Check

1. 3 8 10 Science ▶Word Check ☞ Write the meanings of the words. ▶Phrase Check ☞ Choose the correct word or phrase for each blank. concluded that, because of, turns, is produced, reminds us

2. 3 8 10 Science ▶Reading Comprehension 1 Ancient 'Nutcracker Man' Really Ate Grass A recent study showed that Nutcracker Man did not eat nuts. The ancient pre-human was called "Nutcracker Man" because of his large teeth and powerful jaw. Scientists concluded that he actually chewed grasses instead."The study reminds us that things are not always as they seem," said Peter S. Ungar, chairman of anthropology at the University of Arkansas. The new report was written by Thure E. Cerling of the University of Utah and his colleagues. It was published in Proceedings of the National Academy of Sciences. The scientists analyzed the carbon in the enamel of 24 teeth from 22 individuals. These people lived in East Africa between 1.4 million and 1.9 million years ago. One type of carbon is produced from tree leaves and grasses. It turns out that the early human did not eat nuts. Instead, he ate more grasses than any other human ancestor. The skull of the early human was discovered by Mary and Louis Leakey in 1959 at Olduvai Gorge in Tanzania. ☞ Choose the best answer based on the article.

3. 3 8 10 Science ▶Reading Comprehension 2 Ancient 'Nutcracker Man' Really Ate Grass A recent study showed that Nutcracker Man did not eat nuts. The ancient pre-human was called "Nutcracker Man" because of his large teeth and powerful jaw. Scientists concluded that he actually chewed grasses instead."The study reminds us that things are not always as they seem," said Peter S. Ungar, chairman of anthropology at the University of Arkansas. The new report was written by Thure E. Cerling of the University of Utah and his colleagues. It was published in Proceedings of the National Academy of Sciences. The scientists analyzed the carbon in the enamel of 24 teeth from 22 individuals. These people lived in East Africa between 1.4 million and 1.9 million years ago. One type of carbon is produced from tree leaves and grasses. It turns out that the early human did not eat nuts. Instead, he ate more grasses than any other human ancestor. The skull of the early human was discovered by Mary and Louis Leakey in 1959 at Olduvai Gorge in Tanzania. ☞ Write True(T) or False(F). ▶ Structure ☞ Choose the correct answer. 29. It ( turned , revealed ) out that officials had accepted bribes. 30. Ethanol ( produced , is produced ) from grain and organic waste materials.

4. 3 8 10 Science ▶Word Check ☞ Write the meanings of the words. ▶Phrase Check ☞ Choose the correct word or phrase for each blank. concluded that, because of, turns, is produced, reminds us,

5. 3 8 10 Science ▶Reading Comprehension 1 Ancient 'Nutcracker Man' Really Ate Grass A recent study showed that Nutcracker Man did not eat nuts. The ancient pre-human was called "Nutcracker Man" because of his large teeth and powerful jaw. Scientists concluded that he actually chewed grasses instead."The study reminds us that things are not always as they seem," said Peter S. Ungar, chairman of anthropology at the University of Arkansas. The new report was written by Thure E. Cerling of the University of Utah and his colleagues. It was published in Proceedings of the National Academy of Sciences. The scientists analyzed the carbon in the enamel of 24 teeth from 22 individuals. These people lived in East Africa between 1.4 million and 1.9 million years ago. One type of carbon is produced from tree leaves and grasses. It turns out that the early human did not eat nuts. Instead, he ate more grasses than any other human ancestor. The skull of the early human was discovered by Mary and Louis Leakey in 1959 at Olduvai Gorge in Tanzania. ☞ Choose the best answer based on the article.

6. 3 8 10 Science ▶Reading Comprehension 2 Ancient 'Nutcracker Man' Really Ate Grass A recent study showed that Nutcracker Man did not eat nuts. The ancient pre-human was called "Nutcracker Man" because of his large teeth and powerful jaw. Scientists concluded that he actually chewed grasses instead."The study reminds us that things are not always as they seem," said Peter S. Ungar, chairman of anthropology at the University of Arkansas. The new report was written by Thure E. Cerling of the University of Utah and his colleagues. It was published in Proceedings of the National Academy of Sciences. The scientists analyzed the carbon in the enamel of 24 teeth from 22 individuals. These people lived in East Africa between 1.4 million and 1.9 million years ago. One type of carbon is produced from tree leaves and grasses. It turns out that the early human did not eat nuts. Instead, he ate more grasses than any other human ancestor. The skull of the early human was discovered by Mary and Louis Leakey in 1959 at Olduvai Gorge in Tanzania. ☞ Write True(T) or False(F). ▶ Structure ☞ Choose the correct answer. 29. It ( turned , revealed ) out that officials had accepted bribes. 30. Ethanol ( produced , is produced ) from grain and organic waste materials.