1. Does Julia speak four languages very well?
How many languages does Julia speak very well?
Does Julia speak four or five languages very well?
Julia speaks four languages very well, doesn't she?
2. Did we visit our parents last month?
Who did we visit month?
Did we visit our parents last month or this month?
We visited our parents last month, didn't we?
.3. Has he lost his key here?
What has he lost here?
Has he lost his key or his bag here?
He has lost his key here? hasn't he?