[解析]
(1)C.推理判断题.根据第二段的And,rather than fighting for the best possible policies,we may step back and do nothing而不是争取可能最好的政策,我们可能退后一步,什么也不做.可知大众对创造光明未来失去了信心,故答案为C.
(2)D.细节理解题.根据最后一句Only through the unties efforts of people with hope,can we be fully safe against the misuse of science and can science best serve mankind in the future可知,只有团结一致才能对抗那些恶意利用科学的行为,最佳答案为D.
(3)B.细节理解题.根据第一段A recent study,while showing a generally positive attitude toward science,also suggests a widespread worry that it may be"running out of control",This idea is dangerous最近的一项研究显示了对科学的普遍乐观态度,同时也表明人们普遍担心它可能会"失控",这种想法是危险的.可知,人们对科学的意见各不相同,故最佳答案为B.