A Choose the correct answer. 1 I think I lost my wallet while / during I was walking to school. 2 I was still packing

The correct answers are as follows:1. I think I lost my wallet while I was walking to school.2. I was still packing my suitcase when the taxi arrived.3. The underground station was flooded during last night’s storm.4. The new airport was built four years ago. 5. There was no place to park when I got to the port.6. While the passengers were sleeping, a thief stole their luggage.