There are three ndline　 birds in the tree．(对划线部分提问)

　　______ ______ birds are there in the tree?

（完成单词）桰s six and ten sixteen?

　　梇es，that's r ______．

（完成单词）This is my school．There's a l ______．You can borrow (借) books from it．

（完成单词）I don't know this word．Can I use (使用) your d ______?

（完成单词）There are f ______ student，twenty-four boys and twenty-one girls．

（完成单词）Nine and eight is s ______．

（用所给单词的适当形式填空）There ______ (be) a pen and some pencils in my pencil-box．

（用所给单词的适当形式填空）Are there fifteen ______ (boy) in your class?

（用所给单词的适当形式填空）There are eighteen boys in our ______ (class)，Class Six，Grade Seven．

（用所给单词的适当形式填空）This is ______ (Tom) desk．