It is really fun to learn English. 学英语是件有趣的事 It is really fun to explore this area. 探索这地区很有趣 It is really fun to have Christmas parties with our friends. 和我们的朋友一起开圣诞聚会很有趣. It is really fun to walk on the moon. 在月球上行走是相当有趣的事 It is really fun to travel around the world. 到世界各地旅行真有趣.
