sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is mitosis and meiosis and when do they take place?
 sentence 2: When does DNA replication take place? sentence 1: What are songs that you can listen to throughout your entire lifetime and never get tired of?
 sentence 2: What songs can you listen to repeatedly without hardly ever becoming tired of them?
not same meaning
not same meaning
same meaning