4. The purpose of the “lightning speed” exercise is to ________. 　　A. test your maximum reading speed B. help you understand more of the content of the book C. increase your speed by scanning the text first 　　D. enable you to win reading races against your friends

4. The purpose of the “lightning speed” exercise is to ________.
　　A. test your maximum reading speed
B. help you understand more of the content of the book
C. increase your speed by scanning the text first
　　D. enable you to win reading races against your friends

出自：大学英语第二册

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