12. Yes. It is difficult to draw animals and plants, but more difficult to draw people.
13. Of course I can. It is not difficult.
14. He is difficult and not very clever. ( если человек - He, все остал. - It )
15. I say: "Hello or Good day!"
16. They say: " Hello, or good afternoon. "
17 Of course I take pictures.
18. I say," Good night! "