at a desk 与 on a desk的区别
at a desk 与 on a desk的区别
desk 前加的介词 on 与 at 的区别
at the desk和on the desk区别是什么
at the desk和 at desk的区别是
at desk/table,at the chair/desk的区别
What's this on the desk?与What's on the desk的区别.
“A chair is at the desk.
there is a TV on the desk的同义句
I have a computer on my desk.的同义句
I found a book on the desk .的各个句子成分
I have a book on the desk .的同义词
Your book a------on that desk.