[填空题] Several years ago a college professor took a well-organized speech and scrambled it by randomly changing the order of its sentences. He then had a speaker 【B1】 the original version to one group of listeners and the scrambled 【B2】 to another group. After the speeches, he gave a test to see how 【B3】 each group understood 【B4】 they had heard. Not 【B5】. the group that heard the 【B6】. unscrambled speech scored much higher than 【B7】 group. A few years later, two professors 【B8】 the same experiment at another school. But 【B9】 testing how well the listeners comprehended 【B10】 speech, they tested to see what effects the speeches had 【B11】 the listeners’’ attitudes toward the speakers. They 【B12】 that people who heard the well-organized speech believed the speaker 【B13】 much more competent and trustworthy than 【B14】 those who heard the scrambled speech. These are just two 【B15】 many studies that show the importance of organization in speechmaking. You realize how difficult 【B16】 to
A. A．to
B．on
C．at
D．for

[填空题] Several years ago a college professor took a well-organized speech and scrambled it by randomly changing the order of its sentences. He then had a speaker 【B1】 the original version to one group of listeners and the scrambled 【B2】 to another group. After the speeches, he gave a test to see how 【B3】 each group understood 【B4】 they had heard. Not 【B5】. the group that heard the 【B6】. unscrambled speech scored much higher than 【B7】 group. A few years later, two professors 【B8】 the same experiment at another school. But 【B9】 testing how well the listeners comprehended 【B10】 speech, they tested to see what effects the speeches had 【B11】 the listeners’’ attitudes toward the speakers. They 【B12】 that people who heard the well-organized speech believed the speaker 【B13】 much more competent and trustworthy than 【B14】 those who heard the scrambled speech. These are just two 【B15】 many studies that show the importance of organization in speechmaking. You realize how difficult 【B16】 to
A. A．delivered
B．delivering
C．delivers
D．deliver