Round about the year 2,000, the US will face across the Pacific almost four bilion Asian people who, by that time, ( ) full technological matyrity.
1, will reach
2. will have reached
4. have reached
5. shall reach
왜 1번은 안되는지 궁금해요 ..
좀더 넓게 질문하자면 미래시제 vs 미래완료시제 둘중 어떤 것을 답으로 골라야될지
by the time.. by that time.. 이런거 오면
무조건 미래완료시제인가요 ... ?