The problem with the joke, of course, is                            
that it s   64 _ funny. The recent surveys on             64. A) not       C) so
                                                           B) too       D) rarely
65  _ illiteracy (无知  ) are beginning to numb              65. A) political C) educational
(令人震惊): nearly one third of American 17-year-               B) cultural  D) historical
olds cannot even ~ 66    which countries the            66. A) convey C) acknowledge
                                                                                B) identify  D) distinguish
United States   67 against in that war. One third      67. A) struck    C) fought
                                                                                 B) attacked  D) defeated have no _  68  _ when the Declaration oflndepen-      68. A) doubt     C) reason
                                                                                 B) idea      D) sense
dence was   69  . One third thought Columbus           69. A) signed    C) marked
reached the New World after 1750. Two thirds can-          B) edited    D) printed
not correctly   70  the Civil War between 1850           70. A) get       C) place