阅读下面课文段落，按照句子结构的语法性和上下文的连贯要求，空格处各填入一个适当的单词，使短文通顺完整。请将答案写在二卷答题纸上。

◣ A ◢

(Book 8  Unit 1 California)

GOLD MINERS

In 1848, not long after the American-Mexican war, gold was discovered in California. The dream of becoming   小题1:  quickly attracted people from all over the world. The nearest, and therefore the first to arrive,   小题2: South Americans and people from the United States. Then adventurers from Europe and Asia soon followed. In fact, few achieved their  小题3:  of becoming rich. Some died or returned home, but most remained in California to make a life for themselves despite great hardship. They   小题4: in the new towns or on farms. By the time California elected to become the thirty-first federal   小题5: of the USA in 1850, it was already a multicultural society.

◣ B ◢

(Book 8  Unit 3 The problem of the smakes)

When I called up my mother in the countryside on the telephone she was very upset. “There are some   小题6: in our courtyard,” she told me. “Snakes come near the house now and   小题7: , and they seem to have made their home here, not far from the walnut tree. Can you   小题8: rid of them please?” I felt very proud. Here was a chance for me to   小题9: myself by inventing something merciful that would  小题10:  snakes but not harm them. I knew my parents would not like me to hurt these living creatures!

空气位操作，机车需缓解时，可（）空气制动阀手把。