Which question word is used for asking about time?

Choose the correct question word: "I can't find my glasses. _______ are they?"

"I wasn't listening. _______ did she say?"

"Why did they go there?" means the same as "What did they go there _______?"

I pointed at the phone I wanted to buy and said, "_______ is that one?"

After they'd checked the cinema listings, Mario said, " _______ one do you want to see?"

To find out the reason for something, we usually ask a question that begins with

 Jenny made a suggestion. She said, "_______ we go for a walk?"

There was a phone on the floor, so I picked it up and said, "_______ phone is this?"

"How come?" is a more informal way of saying