A. What have you eaten today?

I had rice and soup for breakfast and some meat for lunch. I am not sure what will I eat for dinner.  ✔

=> Corrected spelling.

 B. Make these sentences into English.

 (12/15/21)

-간이 콩알만 해 졌잖아.

 I got the fright of my life -> You frightened me to death.

-그에 여자친구가 고무신 거꾸로 신었나 봐요.

She ditched her boyfriend while he served in the army -> His girlfriend found someone else.

-아버지한테 귀에 못이 박힐 정도로 많이 들었어요.

I've heard that from my father more than enough -> My father told me about those old days until my ears hurt.

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