문제 내용: 밑줄 친 부분에 들어갈 말로 가장 적절한 것은?
  A: Oh, another one! So many junk emails!
  B: I know. I receive more than ten junk emails a day.
  A: Can we stop them from coming in?
  B: I don't think it's possible to block them completely.
  A:
  B: Well, you can set up a filter on the settings.
  A: A filter?
  ?
선택지 1: Do you write emails often
선택지 2: Isn't there anything we can do
선택지 3: How did you make this great filter
선택지 4: Can you help me set up an email account