（24-25高一下·江苏宿迁·期中）When you walk along a beach, you may spot colorful bits of broken glass in the sand. But these shiny treasures didn’t start out that way — they were once discarded as useless glass waste by humans. Over time, ocean waves wash and polish the broken glass, turning it into smooth “sea glass.” This process shows how human actions interact with Earth’s natural forces to create something unexpected and beautiful.
Before the 1960s, many U. S. trash sites were left open to rain and wind. Since these sites were often near rivers or coasts, rainwater could wash trash — like glass bottles — into the ocean. On their way to the ocean, glass bottles would run into rocks and other objects, which would break the glass into smaller pieces. Waves then carried the pieces to the sea. Over time, waves push the glass along the sandy ocean floor, making it roll over and over. This process smooths sharp edges and turns clear glass into cloudy, frosted sea glass.
Today, selling and trading sea glass has become a profitable industry in the United States. Sea glass jewelry and collections can be found at craft fairs and markets nationwide. However, due to the rise of single-use plastics as an another way to replace glass bottles, sea glass may soon become harder to find. To solve this problem, some businessmen have begun to produce artificial sea glass using rock tumblers and chemicals.
Recycling glass can be challenging because it is heavy and not always cost-effective to transport. There are few markets for recycled glass. Despite these difficulties, recent environmental activists have pushed for more green ways to replace single-use plastics. Aluminum bottles and cans are becoming increasingly popular, but glass remains an optional way. When glass is not properly recycled, it continues to be thrown away, ensuring that natural sea glass will still appear on beaches for future generations to find and appreciate.
96．What does the underlined word “discarded” in paragraph 1 mean?
A．picked out. B．thrown away. C．gathered together. D．cut down.
97．What happened to glass bottles before they reached the ocean?
A．They were damaged by the sun. B．They were eaten by fish.
C．They hit rocks and broke into pieces. D．They were collected by people.
98．How do businessmen solve the problem that sea glass is harder to find?
A．By selling more jewelry. B．By collecting sea glass.
C．By using aluminum bottles. D．By creating artificial sea glass.
99．What does the author imply about the future of natural sea glass?
A．It’s not going away anytime soon. B．It will be replaced by aluminum cans.
C．It will become increasingly expensive. D．It will disappear due to recycling efforts.
【答案】96．B 97．C 98．D 99．A
【知识点】科普知识 、说明文
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