We use ___________ tense to talk about something that happened before another action in the past. For the action that happened later, we use ___________ tense to indicate it.
Past perfect; past simple
By the time Connie _________ (be) 18 years old, she __________ (perform) in over 30 cities worldwide.
was, had performed
Peter and John _________ (become) less hardworking since they finished the first term exam.
have become
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