1. The young girl sitting next to me on the plane was very nervous. She ______ before.
A. hasn’t flown B. didn’t fly C. hadn’t flown D. wasn’t flying
2. — The food here is nice enough. — My friend ______ me a right place.
A. introduces B. introduced C. had introduced D. was introducing
3. When Mark opened the door, he saw a woman standing there. He ______ her before.
A. never saw B. had never seen C. never sees D. has never seen
