1 Circle the correct answer. 1 I never saw / have never seen a dinosaur bone in my life, but I hope to see one today. 2 Pops, Mac and Eva travelled / have travelled to the Amazon two months ago. 3 Mac just left / has just left. He's in the garden! 4 I didn't do / haven't done my homework yet. I've been busy. 5 Pops made / has made an exciting discovery in 1997. 6 I wanted/have wanted to be a scientist when I was young. 7 Eva was / has been interested in exploring since she was little. 8 Pops didn't see / hasn't seen Mac and Eva yesterday.

Okay, let's complete the exercise by choosing the correct verb tenses: 1. I have never seen a dinosaur bone in my life, but I hope to see one today. (We use 'have never seen' because it describes a life experience up to now). 2. Pops, Mac and Eva travelled to the Amazon two months ago. (We use 'travelled' because it refers to a specific time in the past - two months ago). 3. Mac has just left. He's in the garden! (We use 'has just left' because it describes an action that happened recently and has a result in the present). 4. I haven't done my homework yet. I've been busy. (We use 'haven't done' because it's an unfinished action with relevance to the present). 5. Pops made an exciting discovery in 1997. (We use 'made' because it refers to a specific time in the past). 6. I wanted to be a scientist when I was young. (We use 'wanted' because it refers to a past state). 7. Eva has been interested in exploring since she was little. (We use 'has been' because it describes an action that started in the past and continues to the present). 8. Pops didn't see Mac and Eva yesterday. (We use 'didn't see' because it refers to a specific time in the past - yesterday).