A military lover who bought a tank on the internet for £30,000 found £2 million in gold inside. First, he and his mechanic were restoring the tank. They were afraid that there were guns inside the fuel tank. When they opened it, they _______ gold bars.

The man called the police. The police took the bars away for investigation and gave _____ a receipt.

https://www.newsinlevels.com/products/gold-in-a-tank-level-3/

Fill in the gap in the first paragraph of the text with the correct verb tense and then, mark the correct option