In the sentence 'They live in the country', the plural form of the verb 'live' is in agreement with the plural subject 'they'.

在They live in the country一句中，动词复数形式live与复数主语they一致。

《牛津词典》

We live in the country. Most of what we see is beautiful nature.

我们住在乡下。我们看到的大多都是美丽的大自然。

youdao

I am one of the many city people who are always saying that given the choice we would prefer to live in the country away from the dirt and noise of a large city.

城市的居民总是说，如果可以选择，我们宁愿住在乡下，远离大城市的肮脏和噪音。我也是其中一个。

youdao

Everybody really tries to come to Washington once in their lives if they live in the country.

VOA: standard.2009.12.08

Every country computes an estimate of how much is spent each year on consumption by the people who live in the country.

每个国家估算出,生活在该国国内居民,每年的消费额。

耶鲁公开课 - 金融市场课程节选

So they could just still live in their villages and out in the country and do their farming and speak their own local language.

他们仍旧可以住在乡下村庄,田间耕种，说当地语。

耶鲁公开课 - 新约课程节选

We have built an infrastructure to hire incredible talent regardless of where they live in the country.

FORBES: Create Jobs With Innovation, In-Shoring, Education

The cities on this list are the riskiest places to live in the country, but only by certain measures.

FORBES: The Country's Most Dangerous Cities

"I always heard about shootings in cities but never felt a connection because I live in the country, " Reeves says.

CNN: One way to fight guns