I only have one exam to go.

我只剩一门考试了。

《牛津词典》

You must play a diamond if you have one.

如果你有方块就必须出。

《牛津词典》

We have one child and are expecting our second in July.

我们有一个孩子，第二个预期在七月出生。

《牛津词典》

"I have kept my mom off of Facebook. She wants one, I said 'No,you can't have one.'

VOA: special.2009.09.14

if we're actually thinking about electron configuration and we look at lithium, sodium and potassium, these all have one valence electron.

让我们来想一想,锂，钠，钾的电子排布，它们都只有一个价电子。

麻省理工公开课 - 化学原理课程节选

It's more of a, exam-based class. So, I actually had my exam yesterday, and I have one more later on.

这门课主要是以考试为主。事实上，我们昨天刚刚考了一次，不久后还要再考一次。

想进布朗的话 - SpeakingMax英语口语达人

However, it does have one enduring claim to fame: it was the setting for The Birds.

BBC: For the birds: Hitchcock��s California

Ms. HUCKABEE: No, we definitely can't, because we do have one of the ones with formaldehyde.

NPR: FEMA Trailer Mom Says Deal Won't Help

To many of the vast majority that don't have one they're an ostentatious waste of cash.

BBC: Why do people still buy personalised number plates?