At the Sports Shop单数单数thisthat复数复数thesethoseoror 还是，或者 用于疑问句或否定句中表示选择关系例如：I dont have brothers or sisters.Do you like milk or tea?你喜欢这件T恤还是那件T恤？Do you like this T-shirt or that T-shirt.Do you like this T-shirt or that T-shirt.I like（want）this（that）one.Do you like these balls or those balls.I like(want)those(these).100 yuan$100 dollars。
