⑴Is that bag heavy ? A、Certainly .
⑵What day is it today ? B、You're welcome .
⑶Is it empty ? C、It's Thursday .
⑷Who's on duty today ? D、Yes , it's heavy .
⑸Can you carry this bag ? E、Li Lei is on duty today .
⑹Let's put the books on the desk . F、Yes , it is .
⑺Thank you . G、OK .
⑻Could you help me ? H、Yes , we are all here .
⑼Let me help you . I、No , thanks .
⑽Are we all here today ? J、No , I can't .
