Dialogue:

W: Hi, John. What are you doing here?

M: I'm waiting for the bus.

W: Where are you going?

M: I'm going to the station to meet my sister.

W: Oh, is she coming by herself?

M: Yes, the train comes in about half past four, but it's twenty past four now. I have only ten minutes!

W: How often does the bus run?

M: Every ten minutes. I missed a No. 1 bus 15 minutes ago, and the next one hasn't come yet!

Question: When will John's sister arrive? 

- At 4:30.

- At 4:20.

- At 4:10.


At 4:30.