3. Tutankhamun's tomb was not robbed.

Решение:

В тексте сказано: "However, most of these tombs were robbed by thieves and all the treasures were stolen. But Tutankhamun's tomb was untouched." Это прямо указывает на то, что гробница Тутанхамона не была разграблена.

Ответ: True