听力原文:M: Have all the workers punched in yet?W: They're supposed to have done so by now
听力原文:M: Have all the workers punched in yet?
W: They're supposed to have done so by now.
What are they talking about and intending to do?
A.Counting the workers who have arrived.
B.Recording the arrival of workers.
C.Punishing the workers who are late.
D.Ensuring the timely arrival of all workers.