4．A．Sure．                                B．Come on．                        C．Yes, I may。

3．A．Yes，you may．                     B．Okay．                                C．Have a good trip．

2．A．Thank you．                          B．Here you are．                      C．You’re welcome。

1．A．He is 31 meters tall．                     B．His tail was broken．             C．It’s wonderful．