根据所给提示，完成句子。每空一词，含缩略词。

1. There were many students in this school last year. (改为否定句)

    There ________ ________ many students in this school last year.

2. The kid is playing the piano at the school music club. (对划线部分提问)

    _________ is the kid ________ the piano?

3. More and more people speak Chinese in the world. (改为被动语态)

    Chinese _________ _________ by more and more people in the world.

4. My cousin usually walks to school every morning. (改为同义句)

    My cousin usually goes to school ________ ________ every morning.

5. 他太累,在公交车上睡着了。(完成译句)

    He was ________ tired ________ he fell asleep on the bus.

吊杆是组成吊顶龙骨骨架的最基本的材料。