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The points system set up by his teacher is an ____ for him to work hard at his studies
  1. prize
  2. treat
  3. reward
  4. incentive
Crafted this question for my fifth graders. What do you think is the answer?
1-3 are retrospective (for his having worked hard in the past) 4 is forward-looking, matching the sentence (for him to work hard in the future),
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Thanks! You make me motivated to continue to come up with questions!
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