sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: How do I improve my pronunciation in English?
 sentence 2: How can I improve fluency in English? sentence 1: Good chiropractor in London?
 sentence 2: After getting MBA degree from Harvard is a job guaranteed for international students?
not same meaning
same meaning
not same meaning