保护环境已成为全人类的一项共同任务，在这一行动中，我们一方面要保护好____ ，一方面要防治____ 。

    Jim, Tom and Tim are in the park. It's a small park, but it's nice. They can see some animals there. There are some birds in the tree. They are yellow. They can fly high. Quack… Quack… What do you hear? Oh，Some ducks. They can swim in the water. There are seven white ducks and nine black ducks. What's that? It's a cat. It's under the tree. It's white. It can jump very fast. The children like the small animals very much.

十月革命后，西方国家的劳动人民在摆脱贫困、文盲、缺乏公民权和经济权的道路上向前迈出了一大步；他们争取到了40小时工作周、妇女选举权、增加工资、强制性社会保险、罢工和工会组织合法化。材料主要表明（    ）