6. Watching movies, listening to music and reading books in English are the only effective ways to help improve my English level. → If I 7. He has to get the IELTS certificate, so he has to go to this IELTS class. → If it were not 8. If he is not at the library now, there is a possibility that he is reading books in the backyard of the school. → If he is (might) 9. The development of this local attraction should be invested in more. This development can bring about more jobs for local people and more revenue for the region. → The development of (which) 10. Mr. Thomas has a nice accent and a good sense of humor. He is my firs English teacher. → Mr. Thomas (who)