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69. What is the author's attitude towards building solar plants?
A. Cautious.
B. Approving.
C. Doubtful.
D. Disapproving.
70. Which is the best title for the passage?
A. How the Railways Have Affected the West
B. How Solar Energy Could Reshape the West
C. How the Effects of Power Plants Can Be Reduced
D. How the Problems of the Highways Have Been Settled
第二节(共5小题：每小题2分，共10分)
根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Public Speaking and Critical Thinking
What is critical thinking? To a certain degree, it's a matter of logic(逻辑)—of being able to spot weaknesses in other people's arguments and to avoid them in your own. It also includes related skills such as distinguishing fact from opinion and assessing the soundness of evidence.
In the broad sense, critical thinking is focused, organized thinking—the ability to see clearly the relationships among ideas. 71 The greatest thinkers, scientists, and inventors have often taken information that was readily available put it together differently to produce new ideas. That, too, is critical thinking.(www.yygrammar.com)
72 As the class goes on, for example, you will probably spend a good deal of time organizing your speeches. While this may seem like a purely mechanical(机械的) exercise, it is closely connected with critical thinking. If the structure of your speech is loose and confused, chances are that your thinking is also disordered and confused. If, on the other hand, the structure is clear, there is a good chance your thinking is too. Organizing a speech is not just a matter of arranging the ideas you already have. 73
What is true of organization is true of many aspects of public speaking. 74 As you work on expressing your ideas in clear, accurate language, you will improve your ability to think clearly and accurately. 75 As you learn to listen critically to speeches in class, you will be better able to assess the ideas of speakers in a variety of situations.
