将下列句子改为单数或复数形式
1.This is a T-shirt in the box.[改为复数]
2.These are knives.[改为单数]
3.It is an apple.[改为复数]
4.They are students in the school.[改为单数]
5.That is a welf.[改为复数]
6.Is there a book in the desk?[改为复数]
二.写出意思相近的句子
1.He has a book in his bag.改为：[ ] [ ] a book in his bag.
2.I am Chinese.改为：I [ ] [ ] [ ].
3.What is the weather like today?改为：[ ] [ ] the weather like today?
4.Thank you.You're welicome.改为[ ][ ].That's[ ][ ].
5.Whose is that dress?It's my dress.改为：[ ][ ]is that?It's[ ].