New Words：

citizen [ˈsɪtɪzn] n. 公民;居民;市民

Sample Sentences：

She became a British citizen by marriage.
To be a good citizen, one must obey the law.
I was born in Spain, but I am a citizen of France now.

marriage [ˈmærɪdʒ] n. 婚姻；结婚

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