As a result of destroying the forest, a large of desert covered the land.
A. number; has
B. quantity; has
C. number; have
D. quantity; have
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A. number; has
(答案→)B. quantity; has
C. number; have
D. quantity; have
解析：考查主谓一致：第一空填quantity，因为a number of修饰可数名词，第二空填has，因为a large quantity of修饰不可数名词，谓语和quantity的数保持一致，句意是：由于森林的毁坏，大量的沙漠覆盖了土地。选B。