面试中，考官问了一些难题。

The ___examiner asked some difficult questions during the interview.

直到考官告诉我通过了考试，我才不紧张了。

I was nervous until the ___examiner told me I had passed the test.

考试前，考官清楚地解释了所有规则。

Before the exam, the ___examiner explained all the rules clearly.