1.Did Lisa bring a letter an hour ago?
When did Lisa bring a letter?
Who brought a letter an hour ago?
Did Lisa bring a letter or a box an hour ago?
Lisa brought a letter an hour ago,didn't she?
2.Did I play soccer last week?
When did I play soccer?
Who played soccer last week?
Did I play soccer or tennis last week?
I played tennis last week,didn't I?