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Referring Questions: Exercise 3 - Answering referring questions based on the text



Instructions: Read the passage and click on the correct choice. When you click on the correct choice, the phrases and sentences relevant to the question will change color.


  Passage 4 of 4

This adapted from Earthshine Could Shed Light on Global Warming, by David Perlman. "The San Francisco Chronicle," May 28, 2004.
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