－What do we need to buy? －.A. Two kilos of potatoes and two packets of saltsB. Two kilos o

问题补充：

－What do we need to buy?

－.

A. Two kilos of potatoes and two packets of salts

B. Two kilos of potatoes and two packet of salt

C. Two kiloes of potatos and two packets of salt

D. Two kilos of potatoes and two packets of salt

答案：

A. Two kilos of potatoes and two packets of salts

B. Two kilos of potatoes and two packet of salt

C. Two kiloes of potatos and two packets of salt

(答案→)D. Two kilos of potatoes and two packets of salt

解析：句意：我们需要买什么？——两千克土豆和两袋盐。英语中potato是可数名词，变复数后面接es。Salt为不可数名词，没有单复数变化，kilo变复数是在后面加s，故选D。