根据首字母或汉语提示完成单词

小题1:Now e              （电的）bikes have become more and more popular.

小题2:They are c              (疯狂的) about dancing and singing.

小题3: My father works in a big foreign c              (公司).

小题4: The building was d               (毁坏) by the fire.

小题5:She is s              (害怕) of the snake.

直齿圆锥齿轮用于两轴（）传动。