Complete the conversation. use the present simple or the past simple or continuous of the werbs

Student: Can you help me with the history exam? Assistant: Of course! What do you need help with? Student: I'm having trouble understanding the causes of World War I. Assistant: Well, World War I was caused by a variety of factors. One of the main causes was the assassination of Archduke Franz Ferdinand in 1914. Student: Were there any other causes? Assistant: Yes, there were several. One important cause was the intense rivalry between European powers, as well as the complex system of alliances that had been formed. Student: Were people aware that the war was going to happen? Assistant: Some people anticipated that a war might break out, but many were still surprised when it actually did. There were tensions and conflicts brewing for years leading up to the war. Student: How long did the war last? Assistant: The war lasted for four years, from 1914 to 1918. Student: What were some of the major events during the war? Assistant: There were several significant events during the war. One notable event was the Battle of the Somme in 1916, which resulted in heavy casualties for both sides. Another important event was the signing of the Treaty of Versailles in 1919, which officially ended the war. Student: Thank you so much for your help! Assistant: You're welcome! I'm glad I could assist you. Do you have any other questions?