根据句意，用括号内所给动词的适当形式填空。
1. By the end of last year, I ________ (be) to the West Hill Farm three times.
2. By the time I got up, Mom ________ (go) out for some exercise.
3. I ________ (learn) 1,000 English words by last term.
4. By 9 o'clock last night, we ________ (get) 200 pictures from the spaceship.
5. When I went into the classroom, the final bell ________ (ring). I was happy that I wasn't late.
