a)

3. He hasn't got a hairbrush.

4. He's got a wallet.

5. He's got a key.

6. He's got a pen.

b)

1. I haven't got an adress book.

2. I've got a mobile.

3. I haven't got a hairbrush.

4. I haven't got a wallet.

5. I've got a key.

6. I've got a pen