Specify the verb, which will agree with its subject in each sentence:
Every historian or anthropologist who ____ 4. (studies, study) Mindanao tribes ____ 5. (has, have) given common observations about the Maranao. Almost all Maranaos ____ 6. (is, are) Muslims, but some who live in the hills around Lake Lanao ____ 7. (follows, follow) a version of Islam reflecting pre-Islamic beliefs and practices. Many scholars ____ 8. (emphasizes, emphasize) that the Maranao, who ____ 9. (is, are) the first inhabitants of the shores of Lake Lanao, still ____ 10. (inhabits, inhabit) this region.