Present/Past perfect

- I ____ enough time to finish the exam. 

I _____ a long time ago.

Until last month, I _____ it before. 

She told me she ____ it ages ago. 

If I ____, I'd tell you.

He's been reading the book for weeks now 

He ____ most of his lifetime in writing his history.

By the time we ____,everyone had left.

- I ____ of it until you mentioned it.  

He bought the car after he'd got his new job