Ответ:
15. Ask your friend to help you with this problem.
16. He began to go in for football
17. I went to the conference to listen to my friend's report.
18. Your duty is to feed the parrot regularly.
19. She asked me to call Andrew immediately.
20. Mike wants to install the new equipment.
21. We like having tea with sandwiches.
22. Our plan is to Visit Rome and Paris.
23. I'm really upset to hear this news.
24. Tom asked me to choose the book for his sister.
25. Pam wanted me to come there early in the morning.
26. I would rather stay at home in such a bad weather.
27. I watched my little son playing in the yard.
28. To swim is such a pleasure.