专升本考试

【单选题】 According to the passage, it is difficult to be certain about the distant future of the universe because we ______.
A．have too many conflicting theories
B．do not have enough funding to continue our research
C．are not sure how the universe is put together
D．have focused our investigations on the moon and planets

网考网参考答案：C
网考网解析：
[考点] 本题为事实细节题。 [解析] 文章第一段第二句和第三句指出，目前我们还不能确切地描绘宇宙未来的发展方向，因为就宇宙形成的过程而言，我们所知甚少。 查看试题解析出处>>