1. zb다음 문장 중 ‘구‘를 ‘절’로 올바르게 고친 것을 고르면?

①At the age of 9, Mozart wrote his first piece of music.

→ When Mozart 9, he wrote his first piece of music.

②During my childhood, I often visited my grandparents.

→ When he was a child, I often visited my grandparents.

③In high school, Tom played football with his friends.

→ When my friends were in high school, Tom played football with them.

④In elementary school, I spent some time hanging out with my friends.

→ When I was in elementary school, I spent some time hanging out with my friends.

⑤I really don't know what to do.

→ I really don't know what should I do.

※ 다음 글을 읽고 물음에 답하시오.

Dear Anne

I have a problem. I want to be a n