GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 5G55EL2LQ7_2K8P5A

As astronomers do not yet have a good understanding of the fundamental nature of dark matter, it should not be a surprise that astronomy students' ideas about dark matter are, at best, ____________. A. superficial B. sketchy C. inconsistent D. mistaken E. outdated F. far-fetched