Which best states the central idea of the passage ? a. police need to do a better job of directing traffic at old home days
b. the town needs to make changes to improve traffic safety during old home days
c. children being left unattended at old home days are causing problems
d. no one has ever been seriously injured during old home days

1. in which sentence is the underlined portion a predicate nominative? for astronauts, going into space to repair orbiting equipment becomes a challenge. for astronauts, going into space to repair orbiting equipment becomes tricky. for astronauts, going into space to repair orbiting equipment becomes challenging. for astronauts, going into space to repair orbiting equipment becomes frequent.