----How much beef do you need to buy?----.A. Two kiloes and a halfB. Two and half a kilosC

问题补充：

----How much beef do you need to buy?

----.

A. Two kiloes and a half

B. Two and half a kilos

C. Two and a half kiloes

D. Two and a half kilos

答案：

A. Two kiloes and a half

B. Two and half a kilos

C. Two and a half kiloes

(答案→)D. Two and a half kilos

解析：two kilos and a half = two and a half kilos 两公斤半。选项AB结构有误，选项C，kilo后面不加es，故选D。