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

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：我们需要卖什么东西？两公斤土豆和两袋盐。Kilo的名词复数直接在此后加s即可，而tomato的复数是在词后加字母es，食盐salt为不可数名词，表示两袋时要用数量词packet，在packet的后面加s即可，故选D。