1. Did you have a good time?
2. My weekend was cool. It was my birthday on Saturday. I played soccer with my friends.
3. My team lost but we had fun.
4. Then we ate pizza for my birthday party.
5. We watched avatar on television. Have you seen it?
6. I did my homework over the weekend so my teachers weren’t angry today.
No one knows.
an unnamed narrator
A progressive form of a verb is formed with the ending "-in": the only verb form in the options that is formed with the ending "ing" is in option b.
The correct option is b: will have been falling. This tense is the future perfect progressive tense.