1. 밑줄 친 부분의 대답으로 선생님이 의도했던 답변이 될 수 없는 것은?

A: Hi, Ann. What's so funny?

B: Hi, Frank. I was just thinking about the joke my brother told me.

A: What's that?

B: Well, a teacher was discussing how machines help people.

A: Go ahead.

B: The teacher asked a student, "Can you name a great timesaver?" "Yes," the student replied.

"Love at first sight."

A: Oh, that's sweet. Now let me tell you one.

① A dishwasher② An airplane

③ A stopwatch④ A fax machine

⑤ A washing machine