

車のガスがもうすぐなくなります。
高速道路に乗る前にガスを入れよう。
ガスはまだ大丈夫?
"ガス" is in the lesson "Transportation" (Level 39), along with 11 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.