Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions. ⇱
Question 1. If not his father's help, Bill couldn't have repaired the roof.
Question 2. He was so careless that he left the work half doing and went to the cinema.
Question 3. After many failures, the author has finally succeeded at having his novel published.
Question 4. His irresponsibility is endangered his career as a doctor.
Question 5. Cameron insisted in getting the contract signed before leaving for the airport.
Question 6. Before he took part in that reality show, Novak has appeared on TV several times.
Question 7. I worked on the problem for two days, but I still can't find any solution to it.
Question 8. It was unfair that the new students were given so low marks.
Question 9. Mark has never used any social networking sites per him how to create a Facebook account.
Question 10. As soon as they were seated, the man began to whisper among themselves.