1)it is true that not everyone can excel in the field in which they are interested.

이 문장에서 in which를 where로 바꿀수 잇나요?

2) but ability is easier to control than interest and personality, if you are a middle schoold student,
you still have much time to seriously think about your job for another two to three years.

another 다음에 단수명사라 배운거같은데 왜 two 가 나온거죠..?

답변해주시면 감사하겟습니다 ㅠㅠ