explain the problems 加了the对吗

Explain the following sentences explain the reason还是explain for the reason The maths problems- problems of the environment THE THIRTEEN PROBLEMS怎么样 比较级前面不用加the,最高级加the ,对吗 Instead of waiting for the teacher to explain.waiting为什么要加in 副词最高级加the算对吗 求你们了,Explain the importance of man known as the pope ,爹爹们, The more you explain,the more I feel confused.这句话是不是错了?为什么?是 THE PROBLEMS OF PHILOSOPHY怎么样 短语in the corner.in corner对吗?必须加the