问题
选择题
---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; would
B．is; will
C．will be; can
D．is ;could
答案
答案：D
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