• 不用背句型学英语Lesson 18:Outdoor Activities OutdoorActivities四季户外活动。It'swarminspring.春天天气温暖。Iwenthiking.我去登山。Leavesturnred.树叶变红了。Swimmingisenjoyable.游泳真是享受的事。Isweatallthetime.我一直流汗。Igotsunstroke.我中暑了......