how to get - She gave me her address but I don't know _____ there., when to call - My brother is always busy so I don't know _____ him. , how many to buy - My mother told me to get some eggs but she didn't tell me _____., where to go - We'd like to travel around the world, but we don't know _____ first. , what to study - She wants to go to university but she doesn't know _____., how much to make - Who's going to be here for lunch? I have pasta but I need to know _____. ,

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