answers: quando...

i. When is the train arriving?

ii. Why is the train late?

iii. Where are you going, guys? (they could be boys, or boys and girls)

iv. How is it going? Why are you (pl.) in a hurry?

v. Who is going to Rome?

vi. Where do I buy the ticket?

vii. How much do two tickets cost?

viii. Which train are you waiting for, ma’am?

ix. What are you looking for, ma’am?

x. Whose suitcase is this? (lit: Of who is this suitcase?)