at a good price 为什么price不加s?不是表示价格就要加s吗?到底在什么时候加s?什么时候不加s.还有what is the price of the book.为什么price不加s?为什么要用the

at a good price 价格合理是at a good price还是at good price at a good price 还是 for a good price at a very good price怎么使用? at a very good price翻译 we have sweater at a very good price为什么用at? Thay are at a good price.这里为什么用的是at? at very good price for only 13 yuan还是 at a very good price for only 13 yuan?为什么?用不用加“a”?为什么? The store has very nice bags at a very good price（ ） girls like you.为什么 be on a good price 还是 be at a good price at a very good price be动词at a very good price前要加be动词不?如：these apples are at a very good price, She wants to buy shirts at a good price.请问这里的介词为什么用at?可以用 with吗? We sell all clothes at very good prices.We haveWe sell all clothes at very good prices.We have hats at a very good price.为什么第一句中的price加s,第二句中的不加? We have sweaters at a very good price-only 25 We have socks at a very good price的意思 sweater,good,is,at,this,price,a(.)连词成句 连词成句 have,a,good,we,shirts,at,price. We have sweaters at a very good price ------only 25