An old friend of mine came near ............. by the train.
A. to kill
B. killing
C. being killed
D. to be killing
Đáp án là C. being killed
Giải thích như sau:
- Use Verb-ing when two things happen at the same time.
- When one action happens during another action, use Verb_ing for longer action
- Passive voice
=> Không hiểu chỗ giải thích.