7. 다음 글을 읽고 밑줄 친 부분을 알맞은 형태로 바꾼 것을 고르시오. For another hour my box went through the sea at the same speed. Suddenly it struck some hard thing, and I heard a noise on the top of the box. Then I felt it raise out of the water. I again pushed up my stick and called for help. This time there was an answer. ① raise ② raises ③ to raise ④ raising ⑤ being raised