阅读短文，掌握大意，然后从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
Last summer, my family and I went to England and we 1 two weeks in Cornwall. It 2 us five hours to get there by car. We stayed in a hotel near a lake. We did a lot of different 3 there: we went for long walks, played games, went shopping and swam in the lake.
I played happily at first, but then 4 terrible happened. One morning I went to the 5 near the hotel by 6 . I walked and walked, watched the 7 singing in the trees and took some photos of them. When I got 8 , I wanted to go back to the hotel 9 food. But I couldn't find the way back. I 10 different ways. However, at last I was still in the 11 place.
"Oh, God! What should I do? I'm so afraid!" I thought. Later it started to rain. I didn't have a(n) 12 so I was wet and cold.
I 13 to stay under a tree and waited for my parents. After 14 hours they found me. It was dark and I was cold, hungry and scared. I will 15 go to the forest again.
枚最新研制的某型导弹中随机抽取
枚来进行发射试验，用每部分选取的号码间隔一样的系统抽样方法确定所选取的