QUESTION: Fix punctuation: At the end of the 21st century Nick meets a robot Werther who feeling sorry for the offender allowed him to go to the launch site
ANS: At the end of the 21st century, Nick meets a robot Werther, who, feeling sorry for the offender, allowed him to go to the launch site.

QUESTION: Fix punctuation: Severe  Generally these dogs have a high fever above 104 degrees Fahrenheit and develop signs very quickly
ANS: Severe – Generally, these dogs have a high fever (above 104 degrees Fahrenheit) and develop signs very quickly.

QUESTION: Fix punctuation: 1965  the first in Sweden to produce duplex board for Tetra Pak
ANS: 1965 - the first in Sweden to produce duplex board for Tetra Pak.

QUESTION: Fix punctuation: The inventory will match the existing structure and maintain the lush expression of the perennial beds and trees
ANS:
The inventory will match the existing structure and maintain the lush expression of the perennial beds and trees.