下面有____双袜子

对下列句中文言句式的判断，正确的一项是（   ）
①吾属今为之虏矣              ②燕国见陵之耻除矣  
③竖子不足与谋                ④何厌之有

_______ you have visited the Great Wall, you can't imagine how great it is.

——Have you ever traveled abroad?
——Sure. I____ in a small town in the USA with my grandparents.