I have found many people complain that work nowadays is more

I have found many people complain that work nowadays is more stressful and less leisuref
I think the causes of the problems can be attributed to social
这是刚刚作文中的两句为什么I have found和I think 后面没有that为什么有些动词后面要加that和which、who 而有些就不要
我现在是一定要通过老师你这里说出来的回答我才把他作为正确的才允许自己把他们摘到本子上去