But the most fascinating fear of the number relates to Friday the 13th.It's a day of double bad luck.In the US，many people would not schedule a wedding for Friday the 13th.According to the Stress Management Center and Phobia Institute in the US，an estimated 17 to 21 million Americans are affected by a fear of this day.

　　【语篇解读】　本文通过一个刺杀总统奥巴马未遂的谋杀，介绍了人与数字的联系。

　　4．From the first two paragraphs, we can know that ．

　　A．a lot of Americans want to kill Barack Obama

　　B．the number 88 is equated with 13

　　C．there are still racists in the US

　　D．the two white Americans had killed 88 African Americans before killing Barack Obama

　　C　[细节理解题。由第二段可知在美国仍有新纳粹种族主义者。]

　　5．When you go aboard the Ryan Air，you will probably find that ．

　　A．row 13 is replaced with 12 A

　　B．there is no gate 13

　　C．passengers complain there is 13 dots on its logo

　　D．none of their planes have row 13

　　D　[细节理解题。由第四段中的"And the popular Irish flight carrier，Ryan Air，has banished(摒弃) row 13 from all its planes."可知D项正确。]

　　6．If you are in the US，you will probably not ．

　　A．live on the 13th floor

　　B．attend a wedding on Saturday the 14th

　　C．see a floor numbered 3

　　D．have an M floor

　　A　[细节理解题。由第四段可知A项正确。]

　　7．From the passage，we can know that the Brussels Airline ．

A．doesn't have row 13