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※ 다음 글을 읽고 물음에 답하시오.(1～2)

Mike   : Hey, Min-su! Let me show you something.

Min-su : (A) OK. What is it?

Mike   : (B) Write down three numbers in a row.

Min-su : (C) I'm ready.

Mike   : (D) Write down the same three numbers             backwards. Subtract the smaller number             from the bigger number.

Min-su : (E) OK. I did.

Mike   : The answer is 198.

Min-su : Wow. How amazing! How did you know?

Mike   : It's a secret.

1. 다음 보기 문장이 들어갈 가장 알맞은 위치는?

     <  보기: Go ahead.  >

 ① (A)             ② (B)                ③ (C)  

 ④ (D)             ⑤ (E)