按常理，鸭子长得越快鸭农越赚钱。但在湖北云梦、京山等地，一些鸭农却养起了“慢生鸭”。在自然环境捕食，辅之以麦麸、玉米、谷糠和青饲料，比用有添加剂的浓缩饲料喂养晚2个多月才能出栏，但肉质好，价格高，成为更有赚头的绿色食品。“绿色食品”是当今的热门话题。为了生产“绿色食品”，下列措施中正确的是（    ）

①使用有剧毒的农药防治病虫害  ②引进抗病虫害的优良品质

③在面粉中添加增白剂、防腐剂  ④利用作物害虫的天敌防治病虫害等

在下列各句的空格内填上一个适当的完整的单词，该词的首字母已给出。
1. Tony is really p____. He keeps waiting outside the house for almost three hours.
2. The f____  stood on the board, laughing happily, because they caught lots of fish this time.
3. When I heard of my grandma's d____, I couldn't help crying.
4.Parents hope their children can do best in the class, so they usually e____  too much of their children.
5. There is nothing in the box. It's e____