1．A．Not at all．B．I think so．C．Thank you．

2．A．That’s OK．B．Wonderful．C．That’s all right．

3．A．Good idea．B．Good luck． C．Yes, please．

4．A．It is warm．B．It will be sunny．C．It was hot．

5．A．Never mind．B．Yes, I think so．C．OK, I will．