Read the following conversation and answer the question.

W: Tomorrow is Mike's birthday. I have just received the invitation to his party. Did Mike invite you, too?

M: Yes. I received his invitation this morning. But he didn't tell me what time the party will begin.

W: I'll ring him up and ask him about it. How will you go to his party?

M: I'll drive to his party after work. Would you like to take my car there?

W: I would be glad to. Thank you.

Question: Why will the woman ring Mike up? 

- To ask him when the party will begin.

- To tell him how to prepare the party.

- To tell him some good news.


To ask him when the party will begin.