when did you __your clothes__?
when did you __your clothes__?
When did you leave?
When did you go?
when did you ---- here?
when did you arrive
When did you coneback?
-----When did you ___
you __your books about
you should__ __your health
Do you know __your mother has returned?应该选if还是when
when did you read English?
when did you start to______?