SSC MTS 19 Sep 2017 Shift 2 Paper

In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. 

The doctor is a very important and ______ person. He works in hospital and dispensary. When a person is sick, he ______ him. He finds out the cause of illness. He gives medicines to ______ the illness. He saves lives of people. He is ______ cheerful and ready to help people. He works so hard and he does not take proper rest and sleep. He does ______ work. We should be thankful to him and give respect to him.