1.Who that has common sense can say such a thing?

that has common sense 요게 어찌된구조로들어간건가요??

2. I will give you anything which you want.
난 너가 원하는 무엇이든 너에게 주겠다

요거 anything 선행사 취하는 관계대명사 which로온거 아닌가요??? 왜 틀린문장이예요??

3. Can you talk me the way how this can be solved??

이건 왜 틀린거인가요??