

いつか外国で働きたいです。
外国で運転したことがありますか。
姉は外国で日本語を教えています。
"がいこくで(外国で)" is in the lesson "Geography" (Level 22), along with 9 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.