мне кажется так !
Ruth is dropping the pencil.
2. He is wearing a blue shirt.
3. The teacher is pointing to the board.
4. John is collecting stamps.
5. She is asking me.
6. They are calling us.
7. The teacher is explaining the tenses.
8. He is inserting a coin.
9. They are swimming in the lake.
10. We are enjoying our holiday.