Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

In what year did the university first see a rise sorry no drop in applications?
In what year did the university first see a drop in applications?

In the layered model of the Earth, the mantle has two layers above it. What are they no sorry it has two layers belows it, what are they?
In the layered model of the Earth, the mantle has two layers below it. What are they? 

How are er what systems classify trade contractors?
What systems classify trade contractors?