The School Committee has one more candidate to interview for the superintendent’s job. Wellesley High School principal Andrew Keough is scheduled to answer questions on Monday at 7 p.m. in Room A-219 at Hopkinton High School. Keough had been one of four finalists for the slot before Holbrook’s superintendent, Joseph Baeta, dropped out of the running last week; he was offered the superintendent’s job in Norton. Last week the board held its public interviews with Cathy MacLeod, the assistant superintendent in Easton, and Steven Hiersche, who has been leading Hopkinton’s system on an interim basis since August. Residents can observe the interview Monday and then interact with Keough afterward in a forum held in the school’s library.