2022考研英语一真题全文及解析(6)

Despite success stories like van Oosten’ s, preservation of plastics will likely get harder. Old objects continue to deteriorate. Worse, biodegradable plastics designed to disintegrate, are increasingly common. And more is at stake here than individual objects. Joana Lia Ferreira, an assistant professor of conservation and restoration at the NOVA School of Science and Technology, notes that archaeologists first defined the great material ages of human history - Stone Age, Iron Age, and so on - after examining artifacts in museums. We now live in an age of plastic, she says, “and what we decide to collect today, what we decide to preserve ... will have a strong impact on how in the future we’ll be seen.”
21. According to Paragraph 1, museums are faced with difficulties in ______.
[A] maintaining their plastic items
[B] obtaining durable plastic artifacts
[C] handling outdated plastic exhibits
[D] classifying their plastic collections
22. Van Oosten believes that certain plastic objects are ______.