Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you to remember the あ portion.
You need to guess the correct answer. What do you choose? You guess A (あ) and hope it's right. Turns out you were right on the money. Well done! Imagine yourself winning a fabulous prize.
I’m glad my guess was right.
If a person was hit with a stone, what would you do?
In a packed train, my hand accidentally touched the butt of the woman next to me and I was so worried I’d be mistaken for a molester.