Ⅰ. 根据句意及首字母提示完成单词(5分)
1. The river near my house u_____ to be clean, but now it’s dirty.
2. We all know that mice are naturally t_____ of cats.
3. Bill likes to do homework with the music o_____.
4. She couldn’t go to s_____ last night because she was worrying about today’s exams.
5. Mrs Brown said she’s afraid of flying in an a_____.
