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quiz 01 how long do mummies stay preserved?��ľ�������Ա����ã���
quiz 02 how did the dove come to symbolize peace?����ʲô����������ƽ����
quiz 03 why is london bridge in the united states?����ʲô���ؘ�����������
quiz 04 how did miss sullivan teach helen keller words?��ɯ����Ůʿ��ν̺����P�ՌW���~����
        words review 1�����~���1��
quiz 05 why can��t people dive to the bottom of the mariana trench?���˞�ʲô���ܝ����R��{���ϵĵײ�����
quiz 06 which country first made chocolate?���Ă�����*�Ȱl�����ɿ�������
quiz 07 what was originally used to make a jack-o��-lantern?���˂�*����ʲô�������ܿ˟�����
quiz 08 why did people first start shaking hands?���˂�*����ʲôҪ���֣���
        words review 2 �����~���2��
quiz 09 what was the original color of the white house?
quiz 10 why was gold used for money?
quiz 11 who made arabic numerals?
        words review 3
answers
workbook
 
quiz 12 has anyone succeeded in going over niagara falls?
quiz 13 how did april fool��s day begin?
quiz 14 who invented the telephone?
quiz 15 what is the real purpose of a carnival, a big festival?
        words review 4
quiz 16 why does santa claus wear red clothes?
quiz 17 why did old coins have holes in them?
quiz 18 what did the first vending machine in history sell?
quiz 19 who wrote a christmas carol, one of the most beloved christmas stories?
        words review 5
quiz 20 why did english become a global language?
quiz 21 do the boys in america give chocolate to their girlfriends on white day?
quiz 22 why did anne frank and her family suffer from nazi persecution?
quiz 23 where is the oldest amusement park in the world?
        words review 6
answers
workbook