1 . 阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写一个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。
A harvest festival is an annual celebration. It usually 1 (occur) around the time of the main harvest. Chinese Mid-autumn Festival is one of the most widely celebrated harvest festivals in the world.The festival 2 (celebrate) on the 15th day of the 8th month of the lunar calendar. For the Chinese, the festival indicates family reunion. Chinese people celebrate the Mid-Autumn Festival with many traditional 3 (activity), such as guessing lantern riddles, appreciating the moon and having delicious moon cakes.
