As a result of destroying the forest, a large of the desert covered the land. A．

As a result of destroying the forest, a large ________of the desert ________covered the land.
A．number; has B．quantity; has
C．number; have D．quantity; have

B

a large(great)quantity of后接可数或不可数名词，作主语时，谓语动词的数与quantity保持一致。句中的desert作不可数名词。