Put the verb into the correct form, present perfect or past simple.

1. It (stop) raining for a while, but now it's raining again.
2. The town is very different now. It (change) a lot.
3. I did German at school, but I (forget) most of it now.
4. The police (arrest) three people, but later they let them go.
5. What do you think of my English? Do you think it (improve) ?
6. I (apply) for a job as a tourist guide, but I wasn't successful.
7. Where's my bike? I (leave) it outside the house, but it's not there now.
8. Look! There's an ambulance over there. There (be) an accident.
9. "Have you heard about Ben? He (break) his arm." 
   "Really? How (happen) that ?"
   "He (fall) off a ladder."