496. I'm going shopping because I need to buy some clothes.
我要去买东西，因为我需要买几件衣服。

497. If this shirt doesn't fit, may I bring it back later?
如果这件衬衣不合身，我回头可以把它退了吗？

498. What size shoes do you wear?
你穿几号鞋？

499. That suit looks very good on you.
那套衣服你穿很合适。

500. This dress is made of silk, isn't it?
这件衣服是绸做的，对不对？

501. I'd like to try on this sweater.
我想试试这件毛衣。

502. I'm interested in buying a new car.
我很想买一辆新轿车。

503. What's the price of that electric iron?
那种电熨斗卖多少钱？

504. How much is this rug?
这条地毯多少钱？

505. Is this toothpaste on sale today?
这种牙膏今天减价出售吗？

506. That's a beautiful leather wallet, but it costs too much.
那只皮夹很漂亮，但价钱太贵了。

507. How much do I owe you?
一共多少钱？

508. That will be eighteen dollars and seventy-five cents.
十八美元七十五美分。

509. Do you have change for a twenty-dollar bill?
你能换开一张二十元的钞票吗？

510. The clerk helped me find what I wanted.
店员帮我找到了我所要买的东西。