Answer
1. Gorbachev should tear down the Berlin Wall to symbolize the end of the Cold War and to promote peace and unity.
2. The purpose of Reagan's speech was to call for the tearing down of the Berlin Wall and to promote peace and unity.
3. Reagan's statement, "freedom is the victor," is a reasoned judgment, as he cites the end of the Cold War and the reunification of Germany as evidence of freedom's victory.
4. Reagan's speech gradually gained significance as the Cold War ended and the Berlin Wall was torn down, demonstrating the power of his words and the impact of his message.