as a result of destroying the forests,a large___of desert__covered the landa:number b:quantity;has c:number;have d:quantity;have

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as a result of destroying the forests,a large___of desert__covered the landa:number b:quantity;has c:number;have d:quantity;have
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as a result of destroying the forests,a large___of desert__covered the landa:number b:quantity;has c:number;have d:quantity;have
as a result of destroying the forests,a large___of desert__covered the land
a:number b:quantity;has c:number;have d:quantity;have

as a result of destroying the forests,a large___of desert__covered the landa:number b:quantity;has c:number;have d:quantity;have
答案:B
翻译:由于森林的破坏/毁灭,大量的荒漠覆盖了大地.
1.desert为不可数名词,所以不能用a large number of修饰,它只能修饰可数名词复数.
如:There are a large number of students in our school.
由此排除AC;
2.a large quantity of 既可以修饰可数名词,也可以修饰不可数名词.
且quantity短语做句子主语时,谓语动词的数采用就远原则,即和quantity保持一致.
如果quantity是单数,则谓语动词也用单数形式;如果是复数quantities,则谓语动词用复数形式.
如:A large quantity of water is in the bottle.
Large quantities of water are in the bottle.
很明显,句中为单数quantity,所以谓语动词也用单数B has (covered),排除D.
3.综上所述,正确答案为B.

B desert 为不可数名词,不能用 a large number of 因为desert 是不可数名词,所以后面谓语动词用单数!

d is right.
as a result of destroying the forests,a large quantity of desert have covered the land