Ⅰ.单句填空
1. It's really____________________(usual) to have adult conversation like that with such a young child.
2. To my great surprise, the former millionaire is reduced to____________________(beg)on the street now.
3. What is the point of helping him if he doesn't make an effort ____________________(help) himself.
4.We are strongly opposed to using animals ____________________scientific experiments.
5. When it comes to wildlife protection, all species should be treated____________________(equal).
