这些工具是做什么用的？

___What are these tools ___for?

你为什么做那个？

___What are you doing that ___for?

人们喜欢花时间在闷热的车里，陷入交通堵塞，呼吸污染的空气。这是为了什么？

People love spending hours in their stuffy cars, getting stuck in traffic jams and breathing polluted air. ___What ___for?