1、 Step by Step 3000 Unit 7Part IA 1、604,0682、957,2123、2,426,5334、1,719,7435、907,3296、419,3867、36,6458、1,231,3189、1,683,85510，444,50911、3,273,11612、1,400,87313、679,19014、2,528,43715、2,058,34216、960,684B 100 Philosophy 200 Religion300 Social Science 400 Language500 Science 700 Art and Recreation800 Lit
2、erature 900 History, Travel, Biography720 Architecture 730 Sculpture740 Drawing and Design 750 Painting770 Photography 780 Music790 Amusements 791 Public Entertainment 793 Indoor Entertainment 794 Games of Skill796 Outdoor Sports and Games 797 Water Sports799 Fishing. Hunting. ShootingC 1、March 21,
3、1685 January 28, 17502、February 23, 1685 April 14, 17593、January 27, 1756 December 5, 17914、December 17, 1770 March 26, 18275、January 31, 1797 November 19, 18286、February 3, 1809 November 4, 18477、March1,1810 October 17, 18498、October 22, 1811 July 314, 18869、October 25, 1825 June 3, 189910、May 7, 1
4、840 December 6, 1893Part IIA 1(b) 2（a） 3（e ） 4(d)5（c）B 1、 second half 2、18 th3、17 4、75、8 6、17827、about 500 8、about 60 million dollars9、1756 10、December 5, 179111、more than 600Part IIIA 1、b 、New Orleans 2、c、A poor family3、c、Many people 4、a、Jazz music5、a 、After he became an adult6、c、His wonderful jazz music 7、c、Music8、a 、It tells us of the famous jazz musician Louis ArmstrongB 1、 slow 2、sweet 3、fast 4、hot 5、high 6、low7、 strong 8、exciting 9、wenderfulPart IVA 1、 （F） 2、(F) 3、(T) 4、(T) 5、 （T）6、(F)
