What______(happen)______(介）your father this morning?

What______(happen)______(介）your father this morning? Look!What______(happen)there?Oh,there are two women____(argue)there. I don't know what______(happen)in your hometown in the future. I'm wondering what______（happen）to the little girl.She looks so sad at the moment? Lucy hasn't come yet.I don't know what______(happen) to her.答案是has happened ,为什么呢? On the beach,there is always someting __. A.happen B. happens C.to happen D.happening What______(do）dumplings mean? What______(be)your lessons today? What __(happen) in the next room at this time last Sunday? What __(happen) in the next room at this time last Sunday? They never knew what __(happen)to the world in a hundred years 动词时态完型填空：What __(happen) here There is blood on the floor. They never knew what __(happen)to the world in a hundred years what______(do)he__________(do)last week? How __ it ___?(happen) We were boating on the lake when she suddenly fell into the water The __ most driver thinks that accidents only happen to other people.A most B usual C average D general Be careful .If you __ , an accident may happen to you . A. don't B aren't There (happen )__ to be only two eggs in the refrigerator 请各位高手看看怎么变化形式?