soon we will use up all the fuel (that/which/where) means that we need to find new fuels.
여기서 콤마가 없는데도 계속적용법으로 which가 맞는건지

these results support earlier research ( that/which/where) showed that too many choices confuse customers.
여기서도 어떻게 답이 되는건가여?

researchers asked subjects, each of whom had a damaged hippocampus, recall being on a beach in the past.
밑줄친부분이 어법상 틀린게 맞나여? recalling이 정답맞나여? recall 뒤에 목적어로 동명사 오는건가여??답변해주시면 정말로 감사합니다.