当他忘记付房租时，房东太太给了他一张催款单。

When he forgot to pay his rent, his landlady sent him a reminder (=a note asking for payment).

youdao

当他忘记付房租时，房东太太给了他一张催款单。

When he forgot to pay his rent, his landlady sent him a reminder (=a note asking for payment).

youdao