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?

at a very good price怎么使用? at a very good price翻译 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, We have sweaters at a very good price-only 25 We have socks at a very good price的意思 We have sweaters at a very good price ------only 25 have,quilts,price,good,they,at,very,a have,jackets,a,price,very,they,at,good（.）造句 They are at a very good price.(改为同义句) We havesweater at a very good price------only是什么意思 at a good price at a very good price.这里good可以改成great吗? The store has very nice bags at a very good price（ ） girls like you.为什么 We have sweaters at very good price 为什么要加at啊 we have sweater at a very good price为什么用at? We have sweaters at a very good price-only25.句中的at怎么理解 排列句子1.a,sell,goods,we,price,these,good,at,very排列句子1.a,sell,goods,we,price,these,good,at,very 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?