Today I met my new classmate Bella at school. I said __A__ to greet her. Then we met our Chinese teacher Miss Deng on the way to our classroom and we said __B__ to her. She replied "你们好！[Nǐmen hǎo!]".
After class, I said __C__ to Bella. And she replied "再见! [Zàijiàn!]" to me.