Detailed Instructions: In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.
See one example below:
Problem: The car's wheel are loose.
Solution: The car's wheel is loose.
Explanation: The instance of are is replaced by the word is. This makes the sentence grammatically correct.

Problem: Third , the proffeser agrees that the the gas prices in the United States are cheep , and they should rais them to safe the enviroment and people 's healths . 
Solution:
Third , the professor agrees that the gas prices in the United States are cheap , and they should raise them to save the environment and people 's health . 