mr smith has ( )and he is quite able to pay for the house A million dollars B millions of dollarsC millions of dollar D million of dollars （解析）

mr smith has ( )and he is quite able to pay for the house A million dollars B millions of dollarsC millions of dollar D million of dollars （解析）
mr smith has ( )and he is quite able to pay for the house A million dollars B millions of dollars
C millions of dollar D million of dollars （解析）

mr smith has ( )and he is quite able to pay for the house A million dollars B millions of dollarsC millions of dollar D million of dollars （解析）
B million dollar两个词都可数,都有复数形式,且表单位的数词前没有准确数字时要用复数+of的结构表示“数以...计的”,此处数百万美元,美元当然用复数了

B. millions of dollars
dollar可数

b millions of 意思是数百万的
dollor是可数名词，所以是dollors

B
都用复数。