If you buy more than ten they knock 20 pence off . A. a priceB. priceC. the priceD. price

问题补充：

If you buy more than ten, they knock 20 pence off .

A. a price

B. price

C. the price

D. prices

答案：

A. a price

B. price

(答案→)C. the price

D. prices

解析：the price特指买10个以上物品所要的价钱，故要加定冠词the。