第二节.根据课文适当填空.（每小格1分，总分11分）

She had almost reached her destination when a delicious smell 68        her progress and she stopped .So the men had brought home the meat for the 69.      !The smell of cooking meat filled the air 70.      her, and her senses became 71.      with hunger…. 72.      she sat down, only to be scooped up by her laughing, shouting sister, Lala smiled with 73.    .

Leave the beaten track occasionally and 74.      into the woods. Every time you do you will be 75.      to find something that you have never seen before. Follow it up, 76.       all around it, and before you know it, you will have something worth thinking about to 77.      your mind. All really big discoveries are the result of 78.      .

混凝土的抗渗等级是按标准试件在下列哪一个龄期所能承受的最大水压来确定的？（）

A.7d

B.15d

C.28d

D.36d