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单选题
It is _____ that millions of galaxies exist in the vast space outside the Milky Way.
A
estimated
B
hesitated
参考答案
参考解析
解析：
句意：据估计，在银河之外的辽阔星空里存在着数以百万的星系。estimate估计，It is estimated that ...据估计……。hesitate犹豫，踌躇。explain解释，说明。observe观测。
句意：据估计，在银河之外的辽阔星空里存在着数以百万的星系。estimate估计，It is estimated that ...据估计……。hesitate犹豫，踌躇。explain解释，说明。observe观测。
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共用题干
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单选题It is _____ that millions of galaxies exist in the vast space outside the Milky Way.A
estimatedB
hesitated
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