1. 다음 중 대화가 가장 자연스러운 것은?

① A : Do you mind if I read your book?

 B : Yes, not at all. Go ahead.

② A : Are you going to join us for lunch?

 B : I haven't decided to join any club.

③ A : I love Mary. Do you think I should tell her that?

 B : Yes, you shouldn't. Go and tell her.

④ A : I'm looking forward to our school excursion.

 B : Me, either. There's nothing I like more than sightseeing.

⑤ A : You look familiar. Haven't we met before?

 B : I'm not sure. I'm Jinho.