The books are on the chair对 on the chair提问
2.These are my CDs （1）改为否定句。（2）改为一般疑问句。（3）肯定回答。（4）否定回答。3.Are the pictures on the wall?(否定回答）4.Is the CD under the bed?（肯定回答）5 The hat is in the backpack.对in the backpack提问。