21. The word sympathetic in Paragraph 2 most probably means_______.
A. harmful B. agreeable
C. pitiful D. sorry
22. It can be concluded from this passage that_______.
A. plastics are synthetic materials
B. plastics won public acceptance 120 years ago
C. plastics are very harmful in modern life
D. plastics are cheap as antiques
23. Which of the following is essential to create any type of plastics? A. Carbon. B. Eggs.
C. Oil. D. Coal.
24. Plastics that harden into permanent shapes are called_______.
A. chained B. thermoplastic
C. synthetic D. thermosetting
25. Which of the following is the best title for the passage?
A. The Importance of Plastics in the Nineteenth Century.
B. Why People Are Suspicious of Plastics.
C. The Development of Plastics as a Modern Material.
D. How Plastics Are Manufactured.
答案:21. B 22. D 23. A 24. D 25. C
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