Is it on the desk缺两个介词在末尾 缺的是什么?

Is it on the desk缺两个介词在末尾 缺的是什么? The book is on the desk中介词短语on the desk 的句子成分是什么? Is it on the desk?答语是什么?快 填入合适的介词(1)My ruler is not ____ the desk .It is____the desk.I where the desk on ``that it is is it on the desk改成陈述句 what is on the desk的意思是什么? What's on the desk?There is ___pencil on it? the pen is on my desk .it is not mine (定语从句的复合句） Is it on your desk,()? Your pen is not h____.It's on the desk. ()iS my caP?It”s on the desK.