Ⅰ. 根据句意及汉语提示完成单词
1. My sister _______ (花费) more than four thousand yuan for her iPhone 4.
2. On holidays,tourists like to go to Dinghu Mountain because of the _______ (新鲜的) air.
3. It’s ten _______ (分钟) walk from my home to school.
4. Food must be _______ (保存) in cool places in summer．
5. We often listen to our teacher _______ (认真地) in class．
