

中国は大きい国です。
中国のお茶を買いました。
まだ中国に行ったことがありません。
"ちゅうごく(中国)" is in the lesson "Country" (Level 27), along with 12 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.