Open the brackets. Use the Present Perfect or the Past Simple.

1. John has left for London. (Present Perfect, as the result is relevant to the present) 2. He spoke to them two hours ago. (Past Simple, specific time marker "two hours ago") 3. I'm afraid I have lost my wallet. (Present Perfect, the action happened in the past, but the result is relevant now) 4. She has been there since Monday. (Present Perfect, action started in the past and continues to the present, signaled by "since") 5. You have made seven mistakes in your test. (Present Perfect, relevant result in the present) 6. They listened to a great concert last night. (Past Simple, specific time marker "last night") 7. We have won a very important match. (Present Perfect, implied recent past/current result) OR We won a very important match. (Past Simple, if the context implies a finished past event without a current connection. Often these are interchangeable depending on context, but let's assume result-oriented). 8. He has collected a lot of stamps. (Present Perfect, result of his collection is available now) 9. He took a book and went away. (Past Simple, sequential actions in the past) 10. I wrote to him last month. (Past Simple, specific time marker "last month")