1. A: Is it OK **if** I use your **mobile**?
B: **Yes, all right**
2. A: Can I borrow a **pen**, please?
B: Sure, no **problem**.
3. A: Is it **OK** if I use your **scissors**?
B: Yes, that's **fine**.
4. A: Can I **borrow** your **calculator**, please?
B: **Yes**, you can.
5. A: Can I borrow your **eraser**?
B: No, **sorry, you can't**.