1. Mary usually gets up at seven.
Does Mary usually get up at seven? (общ)
Who usually gets up at seven? (спец)
Does Mary usually get up at seven or eight? (альтерн)
2. Liza and Bob are having a party at home at present.
Are Liza and Bob having a party at home at present? (общ)
Who is having a party at home at present? (спец)
Are Liza and Bob having a party at home or at friend`s at present? (альтерн)