如果航班被航空公司取消，你有权获得全额退款。

If the flight is cancelled by the airline, you are entitled to a full ___refund.

退回有缺陷的产品后，她要求退款。

After returning the defective product, she requested a ___refund.

该商店的政策允许凭收据在购买后30天内退款。

The store's policy allows for a ___refund within 30 days of purchase with a receipt.