{{B}}quEstions 29 to 31 ArE BAsED on thE pAssAgE you hAvE just hEArD、{{/B}}

A．supplying BlooD For pEoplE who nEED、
B．proviDing A numBEr oF sErviCEs For thE puBliC、
C．hElping thE siCk AnD wounDED During thE wAr.
D．AiDing pEoplE who wErE injurED in An EArthquAkE.