Question 18: The power failure resulted in many of the underground tra

Question 18: The power failure resulted in many of the underground trains ________ for up to one hour.

• A. to delay
• B. to have delayed
• C. to be delayed
• D. being delayed

result in V-ing: gây ra điều gì
=> Động từ mang nghĩa bị động (bị trì hoãn) nên ta dùng “result in being Vp2”