One Saturday morning, my friends and I ………………..(drive) down to Surf Beach. It ……………….. (be) a beautiful day for surfing with a blue sky and a mild temperature. The waves that ……………….. (be) rolling into the shore ……………….. (promise) fun for us all. I ……………….. (paddle) out to the line-up and ……………….. (catch) a couple of really nice waves. This ……………….. (be) a great start to the day. I ……………….. (be) in the water long after I ……………….. (realise) that I ……………….. (drift) parallel to the beach. I ……………….. (look) back to shore to see where I ……………….. (leave) my gear. This was so I could paddle back to my original position in the lineup. While I ……………….. (look) to shore, I ……………….. (hear) some splashing noises about thirty metres further out to sea. I ……………….. (be) immediately excited because I……………….. (assume) it would be dolphins playing in the water. I ...... often ………………..(see) this happen before, so it ……………….. (be) reasonable to assume that this……………….. (explain) the noises.