下列关于热量、内能与热值说法中，正确的是（　　）

    One summer evening I was sitting by the open window， reading a good novel. I was so 1 the story I was reading that I didn't 2 that it was getting dark. When I realized that it was too dark for me to read 3， I put the book down and got up to turn on the light. Just then I heard someone 4， "Help! Help!" It seemed to come from the trees at the end of the yard. I looked out but it was too dark to see anything clearly. Almost immediately I heard the cry again. It sounds like a child， but I could not 5what someone would be doing in our backyard， unless one of my neighbor's children had climbed a tree and had not been able to 6.

    I decided that I should go out and have 7 in the yard， just in case someone was8. With a flashlight and a stick in my hands， I went out into the yard. Once again I heard the cry and this time there was no doubt that it came from the trees at the far end of the yard. "Who is there?" I 9 as I walked across the yard towards the trees. But there was no 10. With the help of my flashlight， I 11 all over that end of the yard， including the branches of the trees. There was no 12 of anybody or anything. I came to the conclusion that my 13 made fun of me， probably nothing is happening there.

    I had to go back into the house and sat down to read my book again. Not long after that， I was 14 by the loud cry of "Help! Help!" This time it was from right behind me! I dropped my book and jump up. There， sitting on the table was my neighbor's large green and red 15.

    Imagine waking up one day and finding that your beautiful local beach is no more—gone, its fine white sand swept away by an abnormal storm. You go about your daily business for 12 long years and then suddenly the beach is back, all its glory restored by another storm. This is what happened on the island of Achill, off the coast of Ireland, where people are celebrating the return of the beautiful Ashleam Bay beach that was taken from them in 2005.

    That in itself is unusual enough, but the story gets even better! You see, another beach in Achill did a disappearing act once, but took much longer to return. The beach at Doonagh, located only six miles away from Ashleam Bay, was restored earlier in 2016 after waves created by spring storms had swept away all the sand in 1984, leaving just rock pools behind.

    There is local legend that stretches back hundreds of years that says this beach at Ashlcam Bay returns for a short every seven years then disappears again. But this time around it took a bit longer than that. It was last seen in 2005 and it stayed for a few months at that time before it was washed away again.

    As you can imagine, everyone on the island of Achill is thrilled to have their sandy beach back, and even though no one knows how long it's going to be around for, they are making the most of the time they've got before it disappears again.

    Some may be quick to believe climate changes cause the phenomenon, but that's not the reason these two beaches in Achill keep disappearing, Dr Kevin Lynch, a geographer at NUT Galway, says that these occurrences are the result of hydrodynamics (流体力学) and sediment(沉积物) supply, rather than climate changes.

    Regardless of what's causing them, disappearing and reappearing beaches are just part of what makes nature so fascinating.

下列句子标点运用正确的一项是（    ）