A、1 week. B、2 weeks. C、3 weeks. D、4 weeks. C对话中男士提到通常需要“三周”，女士认为“两周”就够了，但经过男士的解释后女士最后同意培训计划持续“三周”。因此，本题答案为C项。

M: Hi, Betty. May I have a discussion about the training program with you?
W: Sure. Take a seat, please.
M: We are planning a training program iter the new employees. [8]They have to learn how to use the machines.
W: That’s fine. How about the training time?
M: Normally, it takes three weeks.
W: At present, almost all operations are controlled by computers. I think two weeks’ training will be enough.
M: But some employees know nothing about the computer.
W: [7]In that case, let’s make it three weeks.
M: OK, thank you!
6. Who will be trained in the program?
7. How long will the training program last?
8. What is the training program mainly about?