Answer:
1. Cultiváramos
2. lloviera
3. Afectaran
4. Quisieran (although it could potentially be both)
5. Consumiéramos
6. Viniera
Step-by-step explanation:
These are all subjunctive sentences except for number 4, meaning they refer to hypothetical or possible actions and not to actions that occur, occurred or will occur. Also, all of them but number 4 are in imperfect preterit time, which is a past tense in which the temporal limits are not clear, as we don't know for sure if the action is still taking place. So subjunctive imperfect preterit is for conditional actions or hypothetical actions that we don't really know if they have taken place yet. Number 4 is not necessarily either one. Quisieron is indicative simple preterit in the first person, and it would state they wanted to help, but being late prevented them from doing so and they no longer want to, therefore it's correct. However, Quisieran is subjunctive imperfect preterit would mean they still want to help, but because they were late they are unable to do so, despite still wanting to, so it would also work. I would go for Quisieran just because the whole homework is on subjunctive imperfect preterit.