I wanted to know which school it was you went to.

我想知道你就读的是哪所学校。

《柯林斯英汉双解大词典》

In times of crisis I know which friends I can turn to.

在危难关头我知道能投靠哪些朋友。

《牛津词典》

I know which area they live in, but whether I can find their house is a different matter.

我知道他们住在哪一地区，但能不能找到他们的住宅则是另外一回事了。

《牛津词典》

Its fairness appeared perfect. The accused person could not know which door was hiding the lady.

VOA: special.2009.04.18

And also had blind evaluators-- people who didn't know which condition they were in, evaluate how they were walking.

还找来盲测员-,那些不了解情况的人，评估他们的走路。

哈佛公开课 - 幸福课课程节选

And a lot of people want to know which are the best shows to see, like the best theatre.

很多人想知道最好看的表演是什么，比如哪里是最好的剧院。

伦敦旅游景点 - SpeakingMax英语口语达人

Needless to say, it's hard to know which of these bills to cheer for.

FORBES: Reprieve For A Dying Species

Does Gap know which competitors to raid, and for which aspects of the business?

FORBES: Fashion Retail:From Afterthought to "Cornerstone" in 10 Years

Now we have great data and know which campaigns are working and where to spend strategically.

FORBES: Marketing Mojo: Making $8K Look Like $120K