In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.

The professor said , This can be changed to the different environments . 
The professor said that this can be changed to the different environments . 

We have to know this problem it 's serious but almost people doens't know about this . 
This is a serious problem , but most people are unaware of it . 

I think they have to get skill on it . 

I think they have to get skill on it . 

