what is on shelf?怎么回答
what are on the shelf?what is on the shelf?为什么are不行?若有前后文,语法
what day is it on?怎么回答啊?
what is the old man sitting on?怎么回答?
what is that knife on the shelf in the kitchen made of?
There is no book on that shelf
the english book is on the shelf
the book on the shelf is mine._ _is_?on the shelf划线
what is going on如何回答?
what is on the table?回答
what is today?怎么回答.
what is up 怎么回答
What is useful怎么回答