문제 내용: 어법상 옳은 것은?
선택지 1: Of the billions of stars in the galaxy, how much are able
  to hatch life?
선택지 2: The Christmas party was really excited and I totally lost
  track of time.
선택지 3: I must leave right now because I am starting work at noon
  today.
선택지 4: They used to loving books much more when they were
  younger.