. What is the present perfect progressive tense of the verb to investigate. Detectives for months. were investigating investigate have been investigating have investigated

What are the benefits of secondary source

Which sentence uses all its nominative case pronouns correctly? a we live on the same street b them and rachel are good skaters. c the redskins fans in the family are fred and me d have joanne and him played tennis together before?

To meet the needs of commuters in the industrial age, city planners implemented the use of phonographs. provided more horses and carriages. borrowed technology from railroads. constructed new telephone lines.