英语非谓语动词题目,要解析,

英语非谓语动词题目,要解析,We sat side by side,watching the sun going down behind the old Texaco service station across the busy street,________ I was never allowed to cross unless ________.A．one；being accompanied B．that；accompanied C．the one；accompanied D．which；accompanying 这题答案给C15．We sat side by side,watching the sun going down behind the old Texaco service station across the busy street,________ I was never allowed to cross unless ________.A．the one；being accompanied B．that；accompanied C． one；accompanied D．which；accompanying 这题选C到底是用one 还是the one?是不是非谓语动词题