Read the paragraphs below and fill in the blanks with the correct and respective relative pronoun.
The Prospects for Survival
Naturally these actions caused great alarm in Russia, 1 , unlike the U.S., was quite vulnerable and had repeatedly been invaded.
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Nor was this the only close call. In September 1983, Russia's early-warning systems registered an incoming missile strike from the United States and sent the highest-level alert to Moscow, 2 the country’s defence authorities were. The Soviet military protocol was to retaliate with a nuclear attack of its own.
In 1995, well after the Soviet Union had collapsed, the U.S. Strategic Command, or Stratcom, 3 is in charge of nuclear weapons, published a study, "Essentials of Post-Cold War Deterrence."
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The corporate sector is carrying out major propaganda campaigns to convince the public that climate change, if happening at all, does not result from human activity. These efforts are aimed at overcoming the excessive rationality of the public, 4 continues to be concerned aboutthe threats that scientists overwhelmingly regard as near-certain and ominous.
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What are the prospects for survival then? They are not bright. But the achievements of those 5 have struggled for centuries for greater freedom and justice leave a legacy that can be taken up and carried forward - and must be, and soon, if hopes for decent survival are to be sustained. And nothing can tell us more eloquently what kind of creatures we are.