题目内容：

I have nice skirts for girls ___ 30 dollars .这里是用for 还是用at请说明原因

优质解答

填for
for +金钱,是“（买或卖）某物多少钱”的意思.再如：I bought a book for twenty yuan yesterday.His father sold the old computer for 2000 yuan.不能用at,at 只与price连用才表示多少价钱的意思,如at a low price.低价.