⑴Let me help you .                           A、No , I can't .

⑵Are we all here today ?                  B、No , thanks .

⑶Is that bag light ?                           C、No , he isn't here .

⑷What day is it today ?                    D、Certainly .

⑸Is it heavy ?                                    E、No , it is heavy .

⑹Who's on duty today ?                  F、I am .

⑺Can you carry it ?                          G、Yes , it is .

⑻Could you help me , please ?       H、OK .

⑼Thanks a lot .                                 I、You're welcome .

⑽Let's put the books in the box .    J、It's Tuesday .