I thought it was understood that my expenses would be paid.

　　我原以為對方已同意支付我的費用。

　　I would appreciate it if you paid in cash.

　　假如你支付現金的話(huà)，我會(huì )不勝感激。

　　She didn't get paid much but it was all good experience.

　　她得到的報酬雖然不高，但有極好的體驗。

　　The balance of$ 500 must be paid within 90 days.

　　500元結欠款必須于90天之內付清。

　　Have they been paid the money that is due to them?

　　他們應得的錢(qián)付給他們了嗎？