随着人们生活水平的提高，私家车数量不断增加，给人们出行带来很多方便．

（1）目前多数汽车使用的燃料是 _________ ．

（2）汽车表面喷漆主要是为了防锈，其原理是 _________ ．

（3）与传统汽车相比，太阳能汽车低碳环保，真正实现了零排放．制造太阳能汽车所用的太阳能电池需要大量的单质硅．单质硅是由石英固体（SiO₂）与碳在高温条件下反应制得的，同时生成一种可燃性气体，该反应的化学方程式为 _________ ．

（4）下列汽车配件及用品中，用合金制作的是（填字母） _________ ．

a．钢铁外壳        

b．玻璃车窗     

c．橡胶轮胎        

d．真皮座椅．

用所给词的适当形式填空。

1. The       (invent) of a space rocket took many years.

2. We must improve the       (able) of speaking English greatly.

3. We should lay the        (found) for our joy in the future.

4. For         (century) this has been their custom.

5. Learning English well must have        (science) ways.

6. She decided that she taught        (she) Japanese.

7. The little boy looked         (curious) at the tall young man.