Question

1. Children were flying ____the air balloon.
2. The boy is sitting____the log.
3. The horse is_____ the ground
4. The scooter is______the ball.
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Answer 1

Answer:

1. in

2. on

3. on

4. on (not very appropriate but the closest)

Explanation:

4. Depends on the meaning of the word 'ball' or how 'ball' is used in this context.