1、t very interesting, but between its pages there was something very interesting indeed. It was a small piece of vellum (羊皮纸) on which was written the secret of the Touchstone! The touchstone was a small pebble (鹅卵石) that could turn any common metal (金属) into gold. The writing explained that it was ly
2、ing among thousands and thousands of other pebbles that looked exactly like it. But the secret was this: The real stone would feel warm, while common ones were cold. So the man sold his belongings, camped on the beach, and began testing pebbles. He knew that if he picked up cold pebbles and threw th
3、em down again, he might pick up the same pebble hundreds of times. So, when he felt one that was cold, he threw it into the sea. He spent a whole day doing this but none of them was the touchstone. Yet he went on and on this way. Pick up a pebble. Cold throw it into the sea. Pick up another. Throw i
4、t into the sea. The days continued into weeks and the weeks into months. One day, however, he picked up a pebble and it was warm. He threw it into the sea before he realized what he had done. He had formed such a strong habit of throwing each pebble into the sea that when the one he wanted came alon
5、g, he still threw it away.根据材料内容选择最佳答案。( ) did the man know the secret of the touchstone A. He knew it from his dream. B. Alexandria told him about it. C. He read about it from a book. D. He found it out in the library.( ) to the text, whats special about the touchstone A. It can tell mens future. B
6、. It can turn common metal into gold. C. It can tell good from bad. D. It can make mens dreams come true.( ) was the touchstone different from other pebbles A. It was cold. B. It was warm. C. It was light. D. It was heavy.( ) did the man probably feel at the end of the text A. Sad. B. Happy. C. Rela
7、xed. D. Bored.( ) s the best title for the textA. A magic bookB. A man who never gives upC. The touchstoneD. The cold and warm pebblesBResearchers may have found an unusual way to cut plastic (塑料的) pollution, one bite at a time.They find that the common wax worm (蜡虫) can eat plastic. And this may he
8、lp to solve the problem with the waste caused by plastic bags. Each year, countless plastic bags are used around the world. They discovered this by accident, Bertocchini, a researcher and also a beekeeper, explains. She says the plastic bags holding the wax worms were riddled with small holes. In ot
9、her words, the bags had holes all over them when the worms were inside. She says she made the chance discovery after taking away the worms from beehives where they lived. She put the worms in a plastic shopping bag, which became full of holes later. After the discovery, Bertocchini carried out timed
10、 experiments (实验) on the worms. When 100 worms were placed in a normal British plastic shopping bag, the holes began to appear in just 40 minutes. After 12 hours, she saw much of the plastic bag had disappeared.Plastic is not the natural food for the wax worms. But the researchers say that since the
11、y lay their eggs in beehives, the worms feed on beeswax. “Wax is a kind of natural plastic,” Bertocchini says.Researchers say they still need to better understand how wax is digested (消化) in the worm. Finding that out could help solve the problem with plastic waste. Bertocchini says they are plannin
12、g to use this research to find a way to cut plastic waste. She says they are working to save our oceans, rivers and all the environment from plastic waste. But, she adds, “We should not throw plastic bags into the environment, just because we now know how to deal with them.”( ) is Bertocchinis disco
13、very A. Wax worms can eat plastic. B. Wax worms live in beehives. C. Wax worms feed on beeswax. D. Wax is a kind of natural plastic.( ) did Bertocchini make the discovery by chance A. By giving food to wax worms. B. By finding holes in plastic bags. C. By testing shopping plastic bags. D. By doing a
14、 study on wax worms.( ) of the following is the closest in meaning to “riddled with” A. Divided into. B. Full of. C. Short of. D. Free from.( ) can we learn from the text A. Plastic bags will disappear in the future. B. Wax worms have greatly cut the plastic waste. C. People will not worry about usi
15、ng plastic bags. D. Researchers are trying a new way to cut plastic waste.( ) do the researchers think of the discovery A. Its just a joke. B. Its of little use.C. Its a perfect discovery. D. It needs further research.C 根据材料内容选择最佳答案。( ) the babysitter works two hours, how much should Jan pay A. . B. 9. C. 27. D. 54.( ) doesnt a phone call work A. When a student wants the job as a babysitter. B.
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