Ответ:

1.  He fell off the bike

2. It has dessapeared

3. Somebody had climbed

4. She has gone

5. was

6. gave

7. He has just gone out

8. haven't come back

9. forgot

Объяснение:

8. связь  с настоящим, поэтому present perfect

1. временной маркер yesterday в первом предложении => соответствие времен, выбирает past  simple.