四上英语新版57页介词在哪里

what are you doing little bear i'm lighting firecrackers be careful ow that hurts don't run down the stairs ouch my arm hurts i am having a bad day watch out wow that water is hot i am having a bad day look out a bike is coming my leg hurt i can't walk are you okay call one two zero oh， i am having a bad day we are taking you to the hospital oh dear， i am having a bad day you have a broken leg please use the sidewalk next time please be more careful son i will this is a very bad day is it over yet。