Question 1: It was one of his most important_____(ACHIEVE) Question 2: The teacher had great_____in his students. (CONFIDENT) Question 3: We have a good_____with our neighbors. (RELATIVE) Question 4: Burning coal is an_____way to heat the house. Gas is much cheaper. (ECONOMY) Question 5: Faraday spent his_____in the countryside. (CHILD) Question 6: Many people think that Faraday is the greatest_____in history. (INVENT) Question 7:_____is often more useful than definition for giving meanings of words. (ILLUSTRATE) Question 8: He left for a_____of reasons. (VARY) Question 9: The United Nations_____is an international one. (ORGANIZE) Question 10: I’m worried about the_____of the children. (SAFE)