2014年是我国第一颗原子弹爆炸成功50周年．我国是爱好和平的国家，却依然研制出原子弹，其主要原因是（    ）

句型转换。
(1) Why don't you play basketball with us?(同义句)
____  ____  play basketball with us ?
(2) There is something wrong with my computer. (同义句)
My computer  ____  ____ .
(3) My friend will arrive in four hours.（对划线部分提问）
____ ____ will your friend arrive?
(4) Does he go to the cinema every weekend?(用next week改写)
____ he____ to the cinema next week?
(5) We will have a sports meeting next week. (改为否定句)
We ____ ____  a sports meeting next week.   

小明同学由于违反实验室基本操作规程，在给试管加热时，试管破裂了。请你帮助他分析并找出试管破裂的几种原因。（至少答出三种情况）____ ，____， ____ 。