about it,/czy about that oraz these/those?

Zdanie:
1."He asked me politely to make a cake for the next day party - I did not feel happy about (that, czy it)" ?
2."my boss offered me a promotion and the increase in my earnings"- prawodłowo ?
3. "He said that I was beautiful and clever and I was the only one in the school who had (these/those) features" ?

1. that
2."my boss offered me a promotion and 'the' AN increase in my earnings
3. "He said that I was beautiful and clever and I was the only one in the school who had THESE features"

Czy,
next day's
?

Dziękuję serdecznie!!!! :))

CZyli jak rozumiem w zdaniu numer 2 zastąpić "THE" "AN", tak? z tym the jest niepoprawnie?

mówisz o jakimś awansie, o jakiejś podwyżce, wspominasz o tym po raz pierwszy