Make questions, then work with a friend and ask and answer

1. walked/Mars / on/people / have?

2. the / has/changed/climate?

3. we/environment/the/have / protected?

4. pollution/trees/has/a lot of/destroyed?

5. stayed/the/has/same/world/the?

1) Have people walked on Mars? - No, they haven't.

2) Has the climate changed? - Yes, he has.

3) Have we protected the enviroment? Yes, we have.

4) Has pollution destroyed a lot of trees? - Yes, it has.

5) Has the world stayed the same? - No, it hasn't.