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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:2065

Playing QQ's "Happy Farm" by planting, watering, fertilizing, spraying, harvesting and selling of virtual vegetables, fruits and flowers, we can find out _____ all the excitement is about.

A.that B.if C.what D.when
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PlayingQQsHappyFarmbyplanting,