楼上机译的,错误很多。
他一进屋我就知道他要说此事。 
He knew I would tell him about this  case the moment he entered the house。
面试人问我第一个问题时，我就知道自己会得到这份工作。
   
I knew I would get this job the moment the interviewer 
asked me the first question。
从这里去北京需要九小时。 
It will take you 9 hours from here to Beijing。
  
我花了半小时才找到他的办公室。 
It took me half an hour to find his office。
你最好快点，否则上课会迟到的。 
You'd better hurry up,or you'll be late for class。
  
你走动最好轻点，否则会弄醒他。 
You'd better be quiet,or you'll wake hime up。
我是最后知道这消息的。
I'm the last one to learn about the news。
  
他是第一位研究外层空间的科学家。 
He is the first scientist studying outer space。 
我看一下手表，心想他会不会准时刻。 
I looked at my watch,thinking whether he will arrive on time。
  
  
他走出房间，心想会不会有人注意到他离开房间。 
He got out of the room,thinking whether someone had noticed 
his leaving。
。。。
这么多,又没奖赏分,建议下次提高悬赏,一次问少点。