What______ when the accident occurred?
举一反三
- This is the place ( ) the traffic accident occurred A: where B: when C: how D: What
- What when the accident occurred A: have you done B: were you doing
- The reason ______ the accident occurred is still unknown. A: why B: what C: how D: which
- What was David Johnston doing when the explosion occurred?
- ― _____ An accident has happened. A. Where was the accident? B. What happened? C. When was the accident? D. Why did it happen?