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1. she comes home at 6 pm.

does she come home at 6 pm?

does she come home at 6 pm or 8 pm?

what time does she come home?

who comes home at 6 pm?

she comes home at 6 pm, doesn't she?

2. they open the windows very often.

do they open the windows very often?

do they open the windows or the doors very often?

what do they open very often?

who opens the windows very often?

they open the windows very often, don't they?