I've had a pretty high fever since yesterday morning.

从昨天早上起，我就一直发高烧。

I'd like to buy some stamps for this letter.

我想买这封信的邮票。

No. Please endorse the check at the back.

不会的。请在支票的背面签名。

Please cash this check.

请兑现这张支票。

Would you please hand me your customs declaration form?

请出示您的申报表给我？

Did you make any long distance calls this morning, or did you sign for your breakfast?

您今天早上没有打长途电话或吃早餐记账？