quantities of的用法Large quantities of cotton ( ) shipped all over the world already.A large quantity of bamboo ( ) used for pipes to carry water.A. has been,are B.has been,is C.have been,isD.have been,are请告诉我用法

基本解释
quantity of
adj.大量,一些
例句
Quantity of order
订单数量
Quantity of output
出产量，输出量；供给量
Quantity of sale
销售量
Quantity of shipment
货运量；发运量
physical quantity of noise
噪声的物理量

a large quantity of n. 谓语动词 用单数

quantity是单数 后面谓语动词就用单数
quantity是复数(也就是quantities) 后面谓语动词就用复数

选C，Large quantities of 后面可以加任何名词，但是后面的动词一律用复数形式。A large quantity of 后面加不可数名词，所以动词用单数。

选C
quantities of和a large quantity of都可修饰可数和不可数。但是不同的是，后面谓语动词的形式要看quantity的形式，而不看它所修饰的名词。
所以不看cotton 和bamboo就知道了

C
可修饰可数或不可数名词，谓语动词单复数取决于quantity，即quantity用单，quantities用复

C
看quantity得单复数决定谓语动词的单复数

c
后面的动词和quantity 配合
有很大争议的关于"a quantity of" 和"quantities of"的主谓一致的问题,关于 a quantity of /quantities of + n.+谓语 中的谓语的单复数形式说法有三：
A.a quantity of /quantities of + n.+谓语,其中谓语的单复数形式与quantity的单复数形式保持一致,eg:
Quantities of nuts were on the table.
A quantity of nuts was on the table.
B.对于a quantity of + n.+谓语 中的谓语的单复数形式与a lot of 相同,即遵循意义一致原则；
而对于quantities of + n.+谓语 中的谓语一定用复数形式,eg:
There is only a small quantity of wine left.
A large quantity of air conditions have been sold since the summer came.
Huge quantities of oil were shipped to Japan last year.
C.a quantity of /quantities of + n.+谓语 中的谓语的单复数形式与a lot of/lots of 相同,即遵循意义一致原则.eg:
Great quantities of sand was washed down the hillside by the rain last night.
各个老师争论个不停..总的来说就是和quantity单复配合吧

C 谓语动词看 quantity是单数还是复数 是单数的话谓语动词就用单三 是复数的话谓语动词用复数形式