INTONATION! In special questions we use the falling tone.
a)A: How was Hilary’s holiday?
B: It was horrible.
A: Where was the hotel?
B: It was high up on a hill.
A: How was Harry?
B: Harry was happy.
b)A: Hurry up to the hospital!
B: How can I help you?
A: I’ve hurt my hand!
B: How did it happen?
A: I was hammering a nail.