"And didn't you swear allegiance to this country when you became a citizen?" she asked.

“当时你没宣誓对这个国家效忠么？”她问。

youdao

Barons had to swear an oath of allegiance to the king.

贵族须宣誓效忠国王。

《牛津词典》

After getting burned once or twice for failing to cover some base, they develop a fool-proof routine to prevent that from happening again, then swear their eternal allegiance to it.

在某些地方上闯过一两次祸之后，他们就会制定出一个易于执行的例程去防止类似事件再次发生，然后发誓会永远拥护它。

youdao

MPs who hold no truck with Almighty God are allowed to swear allegiance without reference to the might of any deity.

ECONOMIST: Abandon oaths all ye who enter here

In May 2001, Abu Ghaith urged individuals at a guest house in Kandahar, Afghanistan, to swear allegiance to bin Laden, according to the charges.

CNN: Bin Laden's son-in-law to be in New York courtroom

Mr Adams and Northern Ireland Education Minister Martin McGuinness both refuse to take their seats because it would require them to swear allegiance to the Queen.

BBC: Irish MPs to get Westminster option