9. It's convenient to make payment in US dollars.
用美元付款較方便。
還能這樣說：
US dollar is very convenient to pay for the goods.
The best choice to pay for the goods is to use US dollar.

10. We don't think you'll refuse to pay.
我們相信你們不會拒付。
還能這樣說：
We don't believe that you will reject the pay.
We little believed that you will refuse the payment.
應用解析：
pay for articles 付貨款；
pay homage 向……致敬；
pay up debt 付清欠款

11. We will try our best to accomodate you on payment terms.
我們盡力在付款方式上照顧您方的要求。
還能這樣說：
We will do all we can to use the payment terms which you require.
We will try our best to meet your request on payment term.
應用解析：
accommodate oneself to 使自己適應于；
accommodate sb. with 向某人提供

12. We can't accept payment on deferred terms.
我們不能接受延期付款。
還能這樣說：
Deferred payment is not acceptable.
We don't allow postponement of payment.
應用解析：
deferred payment 延期付款；
deferrd income 延緩收益