B．Try to give them as many facts as possible.

　　C．Tell them you don't understand the“scientific method”．

　　D．Ignore their questions and change to another topic.

　　解析　推理判断题。从文章倒数第二段可知，美国人注重事实和证据，因此，你应该给他们提供一些例子以便他们更好地理解你的观点。

　　答案　B

　　46．From the last paragraph we can learn that________.

　　A．most communication difficulties are caused by spoken or written language

　　B．Americans are usually modest during a conversation

　　C．Americans use a lot of gestures during an conversation

　　D．you shouldn't use many gestures when talking to an American

　　解析　推理判断题。从文章最后一段可知，美国人在谈话中很少使用手势，而且作者还建议你也要控制住自己的手，因此推断，在跟美国人交谈时不要过多地使用手势。

　　答案　D

　　D

　　The Leaning Tower of Pisa has gone against the laws of gravity for seven and a half centuries.Every year，on June 19th，a professor from the University of Pisa climbs to the bell tower and measures the increase in the slant(倾斜) with special instruments.And every year the professor makes the same report：the tower has learned a bit—about an inch more.Last summer(the year of 2004)，the 125­foot­high tower was leaning an incredible 15 feet out of line.Scientists say that unless a way is found to stop the slant，the tower will collapse in less than 80 years.

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