The happened to be walking along the riverbank then.改变句子形式

the old man happened to be on There ( )nobody in the room.were just happened being were happened happened to be. --What _ to them?--they appeared__in the accident.A.has happened to,be injured B.happened ,to have been injuredC.has happened to ,be injured D.happened ,injured 高二选择题一道There____ nobody in the parking place when he needed help A happened to be B happened to have C happened D happened to 翻译:I happened to be at the station ,when it happened what happened to the I ________ out when the telephone rangA happen B happened C happen to D happened to be 请说明为什么? 30.We ________in the neighborhood.A.happened being B.happened be C happened to be D.are happen请讲的详细点 The happened to be walking along the riverbank then.改变句子形式 The happened to be walking along the riverbank then.改变句子的形式 英语翻译who happened to be at the private after party in a rented house There happened to be nobody in the room 句中的主语是:nobody吗? There happened to be nobody in the hall 属于哪种基本句式 When he got off the train,it happened----为什么用to be raining这个时态? one day,there happened to be an a___on the main street 英语翻译It is missing head happened to be among remains of the fifth centuryB.C. Who happened to be the waitress?一直只知道What happened to sb.却不知道有Who happened to be sb.请问一下这两者有什么区别和联系吗?感激不尽! Peter was happened to be at home that day.为什么是was happened而不是happened