完形填空

     I read a book about the secret of successful kids last week. In this book, we are told about    1     children who not only do well in their studies but also are  2   at sports, music, and so on.

     One of the children in the book is John, a twelve-year-old boy. John works   3   at school and after school he does his homework and reviews what he has learned. John 4   a national science competition and won second prize. He is the captain of the school basketball team. And he takes piano or violin lessons every evening. He also  5   skiing on weekends.

     John is happy though he is  very  6  . He has a special notebook. In the notebook he writes his plans for the next few days. He 7   a smiling face beside each item(项目) that has been completed yet. He says that   8  you are well prepared you don't have to be worried.

     John's parents always give him their support. They spend a lot of time with him, discussing things with him and giving him 9  . They also love to play with John. John says, "Whenever it's time to   10  , we forget all the work and just enjoy ourselves together!"

澳大利亚科学家发现了纯碳新材料“碳纳米泡沫”，下列关于这种“碳纳米泡沫”的叙述中，正确的是（  ）