我不得不退回那件衬衫，因为它不合身。

I had to ___send the ___shirt ___back because it didn't fit me.

如果网上订购的衣服不合身，你可以直接退回。

If clothes from an online order don't fit, you can simply ___send ___them ___back.

产品损坏了，所以我决定退回并要求退款。

The product was damaged, so I decided to ___send ___it ___back for a refund.