The use of iron and steel is very much common in most of the infrastructure being built today. The new methods developed for the production of these essential metals have helped hasten and loosen the supply for the demand. By that, buildings have sufficient supply of these metals.
18) D. All of the above. 19) C.4 20) B. Concrete.
Adolf Hitler overran the following countries: Norway, Denmark, Netherlands, and Belgium. Norway and Denmark should fill in your two blanks. This war was known as the Second World War which lasted from <span>Sep 1, 1939 to Sep 2, 1945 between the Axis and the Allies of the war.
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- Dotz</span>
