the boy likes to do __(实验)to find out something he doesn't undersand

the boy likes to do __(实验)to find out something he doesn't undersand
the boy likes to do __(实验)to find out something he doesn't undersand

the boy likes to do __(实验)to find out something he doesn't undersand
like doing sth或like to do sth 这里实验不只是一个,所以用复数experiments