quEstions 28 to 30 ArE BAsED on thE Following nEws.At thE EnD oF thE nEws itEm, you will BE givEn 15 sEConDs to AnswEr thE two quEstions.
now listEn to thE nEws.
intErnAtionAl EFForts AgAinst sErBiA hAvE BEEn inEFFECtivE BECAusE ______.A．ships CArrying illEgAl suppliEs still sAil Along thE rivEr
B．morE illEgAl gooDs hAvE BEEn CArriED ovEr lAnD
C．loCAl AuthoritiEs DiDn’t AttEmpt to stop illEgAl gooDs
D．thErE hAs BEEn DisAgrEEmEnt ovEr EConomiC sAnCtions