다음 중 두 문장의 의미가 같지 않은 것을 고르세요.
① Our plan for the trip can be changed later.
Our plan for the trip is able to be changed later.
② Sue had to turn in her report by yesterday, but she didn't.
Sue should have turned in her report by yesterday.
③ It is possible that Monica already went to the exhibition.
Monica may already have gone to the exhibition.
④ Nicky failed the last exam. She must take it again.
Nicky failed the last exam. She has to take it again.
⑤ You had to check the time of the movie before you bought the ticket, but you didn't.
You should check the time of the movie before you bought the ticket.