Scientists are not special people. They are just people ________ ask many questions. They always ask themselves, "How do things work? How and why do things happen?" They watch things very carefully and try to solve their questions. They always try to think of new ways to explain things. Sometimes they have to do new experiments over and over again.
1. 윗글의 빈 칸에 알맞은 것은?
2. 윗글의 주제 문장으로 알맞은 것은?