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1. 다음 중 나머지 단어들과 다른 하나는?

①copyright             ②MP3 player

③MP3 files             ④puzzle

⑤ripper

2. 다음 밑줄 친 work의 의미가 다른 것은?

①My watch doesn't work.

②We work 35 hours a week.

③This machine works well.

④Her brother's computer doesn't work.

⑤The door works on a spring.