航空公司承诺将在两周内处理所有延误航班的退款。

The airline promised to process all ___refunds for delayed flights within two weeks.

如果你对商品不满意，可以在7天内申请退款。

If you're not satisfied with the product, you can request ___refunds within 7 days.

商家承诺在收到退货后的7天内处理退款。

The store promises to process ___refunds within 7 days after receiving returned items.