Кому не сложно помогите пожалуйста с английским?

Упр. 397. Расположите по порядку:
a) предложения, в которых ingформа является причастием;

b) предложения, в которых ing форма является герундием.

I. a) When we entered the classroom, we saw many students writing at the desks. b) Do you mind my writing with your pen? c) He was writing a letter when I entered the room. a) We all listened with great interest to the speaker criticizing the new book. b) Criticizing the work of our sports club, he said that it was not satisfactory. c) We were criticizing the work of our sanitary committee at that moment. d) I have no objection to your criticizing me. 3. Inthis picture you can see a young man giving flowers to a girl. 4. Running water is always better than standing water. 5. John likes studying history . 6. Lydia could retell the English story she had read without looking into the book. 7. Everybody ran meet the people returning from the city. 8. Never jump off a moving train. 9. Reading books out-of-doors is his favourite way of spending the summer holidays, but he likes swimming and going on excursions as well. 10. You can learn what the new words mean by looking them up in the dictionary. II. Before going to meet his friend he went home to change his clothes. 12. The remaining cakes were given to the children. 13. The cakes, remaining from the evening, were given to the children. 14. They went out to meet the returning women. 15. Returning home after a good holiday is always pleasant. 16. Returning home after a good holiday he looked the picture of health. 17. They went home quickly, protecting themselves from the rain by walking under the trees. 18. Inthis factory much attention is paid to protecting the health of the workers. 19. He stopped writing and looked around. 20. Playing volley-ball is a good amusement for young people. 21. She left the room without saying a word. 22. We had the pleasure of seeing the performance