1. I wish I could, but I will have a conference that day.

我希望我能去，但那天我还有个会议。

2. Is it okay if we put the appointment off till next Sunday?

我们把约会推到下个星期天可以吗？

3. Do you mind if I change it to another time, say, Sunday?

我想改下见面时间，比如改到周日，你介意吗？

4. I would like to apply for the post of Assistant Accountant.

本人欲应聘助理会计一职。

5. In reply to your advertisement in China Daily of May 18 for a clerk, I offer myself for the post.

欣读5月18日《中国日报》上贵公司招聘职员的广告，敝人愿应征此职。