---Imagination important in science, and it helps us dream up our future.
---You are definitely right. If only something allow me to see insects and spiders magnified without getting close to them.A. was; wouldB. is; willC. will be; canD. is ;could
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解析：第一空是陈述客观真理， 所以用一般现在时态；第二空是虚拟语气，与现在事实相反，用过去式，选D。