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173.For him _____ stage is just _____ means of making living.
A.a;a
B.the;a
C.the;the
D.a;the
174.Accrodigng to ____ World Health Organization,health care plans are needed in all big cities to prevent _____ spread of AIDS.
A.the;/
B.the;the
C.a;a
D./;the
