____________ you work there yes,I___there______I wasfifteen

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____________ you work there yes,I___there______I wasfifteen

第一空填Did,根据下文的“was"第二填worked由第一句中的work得知,第三填when引导状语从句

Did
worked
when

Do
worked
since

Do
have been
since

Do
have been
since

Do
am
since