Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.
Question 29: The company had better develop more rapid and reliant systems for handling customers’ complaints.
A. company B. rapid C. reliant D. complaints
Question 30: My brother leaves his job last week because he did not have any chance to travel.
A. leaves B. because C. did not have D. to travel
Question 31: Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small amount of volcanic ash can damage its engines.
A. do not fly B. vicinity C. because D. its