FAr AwAy on EACh hAnD ______ thE riCh pAsturEs, AnD thE pAtChEs oF DArk EArth mADE rEADy For thE sEED oF BroAD-lEAvED grEEn Crops.
A．prolong
B．strEtCh
C．ExtEnD
D．ExpAnD