The coat (that) i put on the desk is blue,这里的that可否改成which

The coat (that) i put on the desk is blue,这里的that可否改成which The coat (that) I put on the desk is blue.这里的that可以省略吗?为什么? The coat that i put on the desk is blue.怎么看that是做宾语的? That is not the MP4__ I saw on your desk 选项 that ;which;who; 这里的on是什么意思呢：which coat is better on me,the blue one or the b The book that I put on the desk is now missing.这句对吗 whose coat is this CAN I put them on the desk?哪里错 Is that your pen on the desk? where the desk on ``that it is the t___ is so low that you'd better put on your coat the pen that you want is on the desk 能不能用which 为什么 Is that computer on the desk的答句