We _________ (prepare) him for this race for months before ...

★ Past Perfect and Past Perfect Continuous Tense

We _________ (prepare) him for this race for months before he decided to quit.

A. had preparing

B. had prepared

C. had been prepared

D. had been preparing

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When I first met Ann, she _____ (work) in Samsung for 15 years.

A. had been working

B. have been working

C. worked

D. had worked