TOEFL VOCABULARY 를 보다가..
3일부분에
12.Invaluable. precious, priceless 매우 귀중한.
(예문에 보면)
Forensic pathology is an invaluable science that helps criminologists determine how a person died.
라고 써있는데.
Forensic pathology is an invaluable science that helps criminologists determining how a person died.
Forensic pathology is an invaluable science that helps criminologists to determine how a person died.
이 맞는것 아닌가요?