[解析]
(1)C.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C.
(2)B.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B.
(3)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.
(4)D.主旨大意题.通读全文我们知道科学的发展前景会受到一些危险的观点的影响.可知科学的发展主要取决于人们的态度,故选D.