at first ,the bag seems made of real leather.A.sight B.look选哪个?可是答案选择B,所以我很不理解

This is my first bag中first前要加the吗 At first sight the bag seems made of real leather but actually it is just an imitation翻译汉语 at the first crossing first of all first the first at first的区别 at the first,at first与first的区别 sign at the first desk at first ,the bag seems made of real leather.A.sight B.look选哪个?可是答案选择B,所以我很不理解 比较first,at first,in the first placethank you~ first of all,first,at first,for the first time,the first time有什么区别 love at first sight 还是 love at the first sight at the first 与 at first的区别 高手帮忙at first sight还是at THE first sight? at the first floor还是on the first floor in the first year和at the first year Where was the bag at last?谢谢了[飞吻] in the first place与at first区别 the first和at first有什么区别 辨析 first（first of all);at first;in the first place