A. Tell me about your childhood best friend.

They have close friends in school, they seem to be getting along with each other for a long time

Ironically, their characteristics are very similar and that's why they are best friends. ✔

B. Make these sentences into English.

(12/09/21)

-제가 원래 입이 짧아요.

I am picky about food -> I always eat like a bird.

-요즘같이만 잘 풀리면 더 이상 바랄 게 없어요.

I could ask for more, all things being work itself out like these days. -> If I can continue this smooth sailing, then I can't ask for more.

-강연자가 최근 경제 문제에 정곡을 찌르던데요.

The speaker hit the nail on the head about the recent economic issue. -> The speaker hit the mark on current economic problems.

=> Another way: Your sentences are okay and these are other ways of saying them.