the boy on the bike is my classmate .对加粗提问 ( ) ( )() you classmate?

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the boy on the bike is my classmate .对加粗提问 ( ) ( )() you classmate?
the boy on the bike is my classmate .对加粗提问 ( ) ( )() you classmate?

the boy on the bike is my classmate .对加粗提问 ( ) ( )() you classmate?
which boy is your classmate?