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