Grammar and Language Workbook

]
to the effects of pesticides than other
animals. (sensitive)
10. The rate at which fish and birds died after their habitats had been sprayed was 
[
]
than anything Carson had witnessed before. (rapid)
11. Chemical pesticides are still widely used today, but in much 
[
]
quantities. (small)
12. The 
[
]
of these chemicals, DDT, has been banned in the United
States. (powerful )
13. A number of other countries, however, have 
[
]
regulations than the United
States does. (weak)
14. Synthetic pesticides remain in the environment much 
[
]
than was once
believed. (long)
15. Their 
[
]
impact could be on water quality. (great)
16. Some pesticides are known to cause cancer in amounts much 
[
]
than
originally thought. (small)
17. Since the publication of Silent Spring, 
[
]
methods of pest control have been
developed. (safe)
18. Beneficial insects such as ladybugs are used 
[
]
then before. (often)
19. Rachel Carson probably had a 
[
]
influence on the modern environmental
movement than any other single person. (great)
20. Thanks to pioneers such as Rachel Carson, concerned citizens worldwide are taking a 
[
]
stance on environmental issues. (tough)
Name ___________________________________________________ Class _________ Date ____________________
196 
Grammar and Language Workbook, Grade 12
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