people’s well-being will suffer a lot if it is implementedРC. great achievements have already been made in Mars exploration in AmericaРD. unmanned Mars exploration sounds more practical and economical for the momentР65. Which cannot be concluded from the passage?РA. Going to Mars using current technology is quite unrealistic. РB. A Mars mission will in turn promote the development of unmanned program. РC. Bush’s proposal is based on three recent great achievements of space explorationРD. The achievements in space exploration show how well unmanned science has developed. Р66. What is the main idea of the passage?РA. Risky as it is, a Mars mission helps to retain Americas position as a technological leader. РB. A Mars mission is so costly that it may lead to an economic disaster in America.
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