

蚊にさされて、かゆいです。
夏は蚊が多いですね。
部屋に蚊がいませんか。
"か(蚊)" is in the lesson "Insects" (Level 16), along with 21 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.