30.

29.(1) __________________　 __________________

(2)__________________

(3)__________________________________　

28.(1)___________________________　 _________________________________.

(2)_______________________________________________________________________

(3)_______________________________________________________________________

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27. (1)_____________________　 _________________________________.

(2) _________________________________________

______________________ ________________________ ___________________________

___________________________________________________

(3)__________

26. (1)_________________________________________________________________________

______________________________________________________________________________

(2)___________________________________________________________________________

_________________________________________________

(3)_________________________________________　

(4)___________________________　 ______________________________

___________________________________________________________________

____________________________________________

25._______________　 ______________　

____________________________________________　

__________________________

__________________________　

__________________________　

____________　 _____________________________________________________

24.(1)_________ 　(2)__________ 　(3)_____________

23.______________________________________________________　 _________　 _________

___________________________________

______________________________________________________________________________

______________________________________________________________________________

22.(1)______________________________________________________________

___________________________________________________________________

(2)__________________________________________________________________

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21._________________　 _________________　 _________________　 __________________