전치사 목적격관계대명사

[종이컵에 커피]

he is the man (whom) we should rely.

this is the project (which)  i have been engaged for five month

these are the kids (for whom) you should take care

she has been to the city (about which) she is not familiar

he is the manager (on whose decision) his promotion depends

( )부분이 모두 틀렸다는데..왜 틀렷는지, 무엇으로 써야 맞는건지 아시는분 도와주세요~

부탁드려요~

[난,나다]

1.on which 일것 같아요 rely on의존하다라서 전치사가 필요해요
2.engage in 종사하다
3.of 가 필요해요 take care of
4.is familiar with-에 익숙하다
5.번은 잘 모르게네요