Respuesta :
Main clause: Chris's chief interest was tennis.
This means that the subordinate clause (the one which cannot stand on its own) is which he was just learning to play.
The whole subordinate clause is used as an adjective: What kind of tennis? Which he was just learning to play.
This means that the subordinate clause (the one which cannot stand on its own) is which he was just learning to play.
The whole subordinate clause is used as an adjective: What kind of tennis? Which he was just learning to play.