Q; How could public transportation in your city be improved?

A: I think there is no public transportation have to be improved.

I think there's nothing to improve on our public transportation. => Corrected: The sentence is corrected grammatically.

-글쎄, 잘 모르겠어. 계획을 짜야해.

Well, I don't know. I have to make plan. =>Well, I don'tt know. I have to make plans.  => Corrected: The sentence is corrected grammatically.​

-덕보야 무슨 생각 하니?

Duck-bo, what are you thinking? (Correct)

-난 좋은 생각이 있어. 난 할머니, 할아버지 댁에 갈 거야.

I have a good idea. I'll go to grandparents house. =>I have a good idea. I'm going to visit my grandparents.

 => Corrected: The sentence is corrected grammatically.​​